diff --git a/L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index 627db8ec5c..9a114c4565 100644
--- a/L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -470,11 +470,12 @@ public abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_actor.moveToLocation(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			if (!_actor.isMoving())
-			{
-				clientActionFailed();
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// clientActionFailed();
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn.isCreature())
diff --git a/L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index dc29d4cf6e..a6710909d3 100644
--- a/L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -685,6 +685,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, target))
+		{
+			moveTo(target);
+			return;
+		}
+		
 		final int collision = npc.getTemplate().getCollisionRadius();
 		
 		// Handle all WorldObject of its Faction inside the Faction Range
diff --git a/L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index 627db8ec5c..9a114c4565 100644
--- a/L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -470,11 +470,12 @@ public abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_actor.moveToLocation(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			if (!_actor.isMoving())
-			{
-				clientActionFailed();
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// clientActionFailed();
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn.isCreature())
diff --git a/L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index dc29d4cf6e..a6710909d3 100644
--- a/L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -685,6 +685,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, target))
+		{
+			moveTo(target);
+			return;
+		}
+		
 		final int collision = npc.getTemplate().getCollisionRadius();
 		
 		// Handle all WorldObject of its Faction inside the Faction Range
diff --git a/L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index 627db8ec5c..9a114c4565 100644
--- a/L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -470,11 +470,12 @@ public abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_actor.moveToLocation(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			if (!_actor.isMoving())
-			{
-				clientActionFailed();
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// clientActionFailed();
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn.isCreature())
diff --git a/L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index dc29d4cf6e..a6710909d3 100644
--- a/L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -685,6 +685,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, target))
+		{
+			moveTo(target);
+			return;
+		}
+		
 		final int collision = npc.getTemplate().getCollisionRadius();
 		
 		// Handle all WorldObject of its Faction inside the Faction Range
diff --git a/L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index 627db8ec5c..9a114c4565 100644
--- a/L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -470,11 +470,12 @@ public abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_actor.moveToLocation(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			if (!_actor.isMoving())
-			{
-				clientActionFailed();
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// clientActionFailed();
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn.isCreature())
diff --git a/L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index dc29d4cf6e..a6710909d3 100644
--- a/L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -685,6 +685,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, target))
+		{
+			moveTo(target);
+			return;
+		}
+		
 		final int collision = npc.getTemplate().getCollisionRadius();
 		
 		// Handle all WorldObject of its Faction inside the Faction Range
diff --git a/L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index 627db8ec5c..9a114c4565 100644
--- a/L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -470,11 +470,12 @@ public abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_actor.moveToLocation(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			if (!_actor.isMoving())
-			{
-				clientActionFailed();
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// clientActionFailed();
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn.isCreature())
diff --git a/L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index dc29d4cf6e..a6710909d3 100644
--- a/L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -685,6 +685,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, target))
+		{
+			moveTo(target);
+			return;
+		}
+		
 		final int collision = npc.getTemplate().getCollisionRadius();
 		
 		// Handle all WorldObject of its Faction inside the Faction Range
diff --git a/L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index 627db8ec5c..9a114c4565 100644
--- a/L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -470,11 +470,12 @@ public abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_actor.moveToLocation(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			if (!_actor.isMoving())
-			{
-				clientActionFailed();
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// clientActionFailed();
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn.isCreature())
diff --git a/L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index dc29d4cf6e..a6710909d3 100644
--- a/L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -685,6 +685,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, target))
+		{
+			moveTo(target);
+			return;
+		}
+		
 		final int collision = npc.getTemplate().getCollisionRadius();
 		
 		// Handle all WorldObject of its Faction inside the Faction Range
diff --git a/L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index 627db8ec5c..9a114c4565 100644
--- a/L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -470,11 +470,12 @@ public abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_actor.moveToLocation(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			if (!_actor.isMoving())
-			{
-				clientActionFailed();
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// clientActionFailed();
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn.isCreature())
diff --git a/L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index dc29d4cf6e..a6710909d3 100644
--- a/L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -685,6 +685,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, target))
+		{
+			moveTo(target);
+			return;
+		}
+		
 		final int collision = npc.getTemplate().getCollisionRadius();
 		
 		// Handle all WorldObject of its Faction inside the Faction Range
diff --git a/L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index 627db8ec5c..9a114c4565 100644
--- a/L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -470,11 +470,12 @@ public abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_actor.moveToLocation(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			if (!_actor.isMoving())
-			{
-				clientActionFailed();
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// clientActionFailed();
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn.isCreature())
diff --git a/L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index dc29d4cf6e..a6710909d3 100644
--- a/L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -685,6 +685,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, target))
+		{
+			moveTo(target);
+			return;
+		}
+		
 		final int collision = npc.getTemplate().getCollisionRadius();
 		
 		// Handle all WorldObject of its Faction inside the Faction Range
diff --git a/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index 627db8ec5c..9a114c4565 100644
--- a/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -470,11 +470,12 @@ public abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_actor.moveToLocation(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			if (!_actor.isMoving())
-			{
-				clientActionFailed();
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// clientActionFailed();
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn.isCreature())
diff --git a/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index dc29d4cf6e..a6710909d3 100644
--- a/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -685,6 +685,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, target))
+		{
+			moveTo(target);
+			return;
+		}
+		
 		final int collision = npc.getTemplate().getCollisionRadius();
 		
 		// Handle all WorldObject of its Faction inside the Faction Range
diff --git a/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index 627db8ec5c..9a114c4565 100644
--- a/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -470,11 +470,12 @@ public abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_actor.moveToLocation(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			if (!_actor.isMoving())
-			{
-				clientActionFailed();
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// clientActionFailed();
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn.isCreature())
diff --git a/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index dc29d4cf6e..a6710909d3 100644
--- a/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -685,6 +685,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, target))
+		{
+			moveTo(target);
+			return;
+		}
+		
 		final int collision = npc.getTemplate().getCollisionRadius();
 		
 		// Handle all WorldObject of its Faction inside the Faction Range
diff --git a/L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index e0d7820da7..e99f81ad49 100644
--- a/L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -479,15 +479,12 @@ abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_accessor.moveTo(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			// Mobius: Solves moving to wrong Z when not using geodata,
-			// but probably is not accurate and you should use geodata.
-			// _accessor.moveTo(pawn.getX(), pawn.getY(), _actor.getZ(), offset);
-			
-			if (!_actor.isMoving())
-			{
-				_actor.sendPacket(ActionFailed.STATIC_PACKET);
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// _actor.sendPacket(ActionFailed.STATIC_PACKET);
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn instanceof Creature)
diff --git a/L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index d264b1ea55..09134489c7 100644
--- a/L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -667,8 +667,8 @@ public class AttackableAI extends CreatureAI
 			}
 		}
 		
-		final Creature originalAttackTarget = getAttackTarget();
 		// Check if target is dead or if timeout is expired to stop this attack
+		final Creature originalAttackTarget = getAttackTarget();
 		if ((originalAttackTarget == null) || originalAttackTarget.isAlikeDead() || ((originalAttackTarget instanceof PlayerInstance) && (((PlayerInstance) originalAttackTarget).isInOfflineMode() || !((PlayerInstance) originalAttackTarget).isOnline())) || (_attackTimeout < GameTimeController.getGameTicks()))
 		{
 			// Stop hating this target after the attack timeout or if target is dead
@@ -684,6 +684,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, originalAttackTarget))
+		{
+			moveTo(originalAttackTarget.getX(), originalAttackTarget.getY(), originalAttackTarget.getZ());
+			return;
+		}
+		
 		// Call all WorldObject of its Faction inside the Faction Range
 		if (((NpcInstance) _actor).getFactionId() != null)
 		{
diff --git a/L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index e0d7820da7..e99f81ad49 100644
--- a/L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -479,15 +479,12 @@ abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_accessor.moveTo(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			// Mobius: Solves moving to wrong Z when not using geodata,
-			// but probably is not accurate and you should use geodata.
-			// _accessor.moveTo(pawn.getX(), pawn.getY(), _actor.getZ(), offset);
-			
-			if (!_actor.isMoving())
-			{
-				_actor.sendPacket(ActionFailed.STATIC_PACKET);
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// _actor.sendPacket(ActionFailed.STATIC_PACKET);
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn instanceof Creature)
diff --git a/L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index d264b1ea55..09134489c7 100644
--- a/L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -667,8 +667,8 @@ public class AttackableAI extends CreatureAI
 			}
 		}
 		
-		final Creature originalAttackTarget = getAttackTarget();
 		// Check if target is dead or if timeout is expired to stop this attack
+		final Creature originalAttackTarget = getAttackTarget();
 		if ((originalAttackTarget == null) || originalAttackTarget.isAlikeDead() || ((originalAttackTarget instanceof PlayerInstance) && (((PlayerInstance) originalAttackTarget).isInOfflineMode() || !((PlayerInstance) originalAttackTarget).isOnline())) || (_attackTimeout < GameTimeController.getGameTicks()))
 		{
 			// Stop hating this target after the attack timeout or if target is dead
@@ -684,6 +684,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, originalAttackTarget))
+		{
+			moveTo(originalAttackTarget.getX(), originalAttackTarget.getY(), originalAttackTarget.getZ());
+			return;
+		}
+		
 		// Call all WorldObject of its Faction inside the Faction Range
 		if (((NpcInstance) _actor).getFactionId() != null)
 		{
diff --git a/L2J_Mobius_CT_2.4_Epilogue/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_CT_2.4_Epilogue/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index 93f6ad0ffa..77ec12c63e 100644
--- a/L2J_Mobius_CT_2.4_Epilogue/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_CT_2.4_Epilogue/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -533,11 +533,12 @@ public abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_actor.moveToLocation(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			if (!_actor.isMoving())
-			{
-				clientActionFailed();
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// clientActionFailed();
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn.isCreature())
diff --git a/L2J_Mobius_CT_2.4_Epilogue/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_CT_2.4_Epilogue/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index dc0b2925b5..06b262f62b 100644
--- a/L2J_Mobius_CT_2.4_Epilogue/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_CT_2.4_Epilogue/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -835,6 +835,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, originalAttackTarget))
+		{
+			moveTo(originalAttackTarget);
+			return;
+		}
+		
 		final int collision = npc.getTemplate().getCollisionRadius();
 		
 		// Handle all WorldObject of its Faction inside the Faction Range
diff --git a/L2J_Mobius_CT_2.6_HighFive/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_CT_2.6_HighFive/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index 93f6ad0ffa..77ec12c63e 100644
--- a/L2J_Mobius_CT_2.6_HighFive/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_CT_2.6_HighFive/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -533,11 +533,12 @@ public abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_actor.moveToLocation(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			if (!_actor.isMoving())
-			{
-				clientActionFailed();
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// clientActionFailed();
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn.isCreature())
diff --git a/L2J_Mobius_CT_2.6_HighFive/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_CT_2.6_HighFive/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index dc0b2925b5..06b262f62b 100644
--- a/L2J_Mobius_CT_2.6_HighFive/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_CT_2.6_HighFive/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -835,6 +835,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, originalAttackTarget))
+		{
+			moveTo(originalAttackTarget);
+			return;
+		}
+		
 		final int collision = npc.getTemplate().getCollisionRadius();
 		
 		// Handle all WorldObject of its Faction inside the Faction Range
diff --git a/L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index 627db8ec5c..9a114c4565 100644
--- a/L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -470,11 +470,12 @@ public abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_actor.moveToLocation(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			if (!_actor.isMoving())
-			{
-				clientActionFailed();
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// clientActionFailed();
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn.isCreature())
diff --git a/L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index dc29d4cf6e..a6710909d3 100644
--- a/L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -685,6 +685,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, target))
+		{
+			moveTo(target);
+			return;
+		}
+		
 		final int collision = npc.getTemplate().getCollisionRadius();
 		
 		// Handle all WorldObject of its Faction inside the Faction Range
diff --git a/L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index 627db8ec5c..9a114c4565 100644
--- a/L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -470,11 +470,12 @@ public abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_actor.moveToLocation(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			if (!_actor.isMoving())
-			{
-				clientActionFailed();
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// clientActionFailed();
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn.isCreature())
diff --git a/L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index dc29d4cf6e..a6710909d3 100644
--- a/L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -685,6 +685,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, target))
+		{
+			moveTo(target);
+			return;
+		}
+		
 		final int collision = npc.getTemplate().getCollisionRadius();
 		
 		// Handle all WorldObject of its Faction inside the Faction Range
diff --git a/L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index 627db8ec5c..9a114c4565 100644
--- a/L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -470,11 +470,12 @@ public abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_actor.moveToLocation(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			if (!_actor.isMoving())
-			{
-				clientActionFailed();
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// clientActionFailed();
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn.isCreature())
diff --git a/L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index dc29d4cf6e..a6710909d3 100644
--- a/L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -685,6 +685,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, target))
+		{
+			moveTo(target);
+			return;
+		}
+		
 		final int collision = npc.getTemplate().getCollisionRadius();
 		
 		// Handle all WorldObject of its Faction inside the Faction Range
diff --git a/L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index 627db8ec5c..9a114c4565 100644
--- a/L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -470,11 +470,12 @@ public abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_actor.moveToLocation(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			if (!_actor.isMoving())
-			{
-				clientActionFailed();
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// clientActionFailed();
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn.isCreature())
diff --git a/L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index dc29d4cf6e..a6710909d3 100644
--- a/L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -685,6 +685,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, target))
+		{
+			moveTo(target);
+			return;
+		}
+		
 		final int collision = npc.getTemplate().getCollisionRadius();
 		
 		// Handle all WorldObject of its Faction inside the Faction Range
diff --git a/L2J_Mobius_Classic_2.4_SecretOfEmpire/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_Classic_2.4_SecretOfEmpire/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index 627db8ec5c..9a114c4565 100644
--- a/L2J_Mobius_Classic_2.4_SecretOfEmpire/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_Classic_2.4_SecretOfEmpire/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -470,11 +470,12 @@ public abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_actor.moveToLocation(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			if (!_actor.isMoving())
-			{
-				clientActionFailed();
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// clientActionFailed();
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn.isCreature())
diff --git a/L2J_Mobius_Classic_2.4_SecretOfEmpire/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_Classic_2.4_SecretOfEmpire/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index dc29d4cf6e..a6710909d3 100644
--- a/L2J_Mobius_Classic_2.4_SecretOfEmpire/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_Classic_2.4_SecretOfEmpire/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -685,6 +685,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, target))
+		{
+			moveTo(target);
+			return;
+		}
+		
 		final int collision = npc.getTemplate().getCollisionRadius();
 		
 		// Handle all WorldObject of its Faction inside the Faction Range
diff --git a/L2J_Mobius_Classic_3.0_TheKamael/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_Classic_3.0_TheKamael/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index 627db8ec5c..9a114c4565 100644
--- a/L2J_Mobius_Classic_3.0_TheKamael/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_Classic_3.0_TheKamael/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -470,11 +470,12 @@ public abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_actor.moveToLocation(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			if (!_actor.isMoving())
-			{
-				clientActionFailed();
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// clientActionFailed();
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn.isCreature())
diff --git a/L2J_Mobius_Classic_3.0_TheKamael/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_Classic_3.0_TheKamael/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index dc29d4cf6e..a6710909d3 100644
--- a/L2J_Mobius_Classic_3.0_TheKamael/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_Classic_3.0_TheKamael/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -685,6 +685,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, target))
+		{
+			moveTo(target);
+			return;
+		}
+		
 		final int collision = npc.getTemplate().getCollisionRadius();
 		
 		// Handle all WorldObject of its Faction inside the Faction Range
diff --git a/L2J_Mobius_Classic_Interlude/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_Classic_Interlude/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index 627db8ec5c..9a114c4565 100644
--- a/L2J_Mobius_Classic_Interlude/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_Classic_Interlude/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -470,11 +470,12 @@ public abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_actor.moveToLocation(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			if (!_actor.isMoving())
-			{
-				clientActionFailed();
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// clientActionFailed();
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn.isCreature())
diff --git a/L2J_Mobius_Classic_Interlude/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_Classic_Interlude/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index c0d4d5fc50..4e274b1de3 100644
--- a/L2J_Mobius_Classic_Interlude/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_Classic_Interlude/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -685,6 +685,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, target))
+		{
+			moveTo(target);
+			return;
+		}
+		
 		final int collision = npc.getTemplate().getCollisionRadius();
 		
 		// Handle all WorldObject of its Faction inside the Faction Range
diff --git a/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index 627db8ec5c..9a114c4565 100644
--- a/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -470,11 +470,12 @@ public abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_actor.moveToLocation(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			if (!_actor.isMoving())
-			{
-				clientActionFailed();
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// clientActionFailed();
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn.isCreature())
diff --git a/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index dc29d4cf6e..a6710909d3 100644
--- a/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_Essence_4.0_DwellingOfSpirits/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -685,6 +685,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, target))
+		{
+			moveTo(target);
+			return;
+		}
+		
 		final int collision = npc.getTemplate().getCollisionRadius();
 		
 		// Handle all WorldObject of its Faction inside the Faction Range
diff --git a/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/ai/AbstractAI.java b/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/ai/AbstractAI.java
index 627db8ec5c..9a114c4565 100644
--- a/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/ai/AbstractAI.java
+++ b/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/ai/AbstractAI.java
@@ -470,11 +470,12 @@ public abstract class AbstractAI implements Ctrl
 			// Calculate movement data for a move to location action and add the actor to movingObjects of GameTimeController
 			_actor.moveToLocation(_actor.isPlayable() ? pawn : null, pawn.getX(), pawn.getY(), pawn.getZ(), offset);
 			
-			if (!_actor.isMoving())
-			{
-				clientActionFailed();
-				return;
-			}
+			// May result to make monsters stop moving.
+			// if (!_actor.isMoving())
+			// {
+			// clientActionFailed();
+			// return;
+			// }
 			
 			// Send a Server->Client packet MoveToPawn/CharMoveToLocation to the actor and all PlayerInstance in its _knownPlayers
 			if (pawn.isCreature())
diff --git a/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/ai/AttackableAI.java b/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/ai/AttackableAI.java
index dc29d4cf6e..a6710909d3 100644
--- a/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/ai/AttackableAI.java
+++ b/L2J_Mobius_Essence_5.0_Sylph/java/org/l2jmobius/gameserver/ai/AttackableAI.java
@@ -685,6 +685,13 @@ public class AttackableAI extends CreatureAI
 			return;
 		}
 		
+		// Actor should be able to see target.
+		if (!GeoEngine.getInstance().canSeeTarget(_actor, target))
+		{
+			moveTo(target);
+			return;
+		}
+		
 		final int collision = npc.getTemplate().getCollisionRadius();
 		
 		// Handle all WorldObject of its Faction inside the Faction Range