Prevent setting region to null from within L2Object.

L2J_Mobius_3.0_Helios/java/com/l2jmobius/gameserver/model/L2Object.java

@@ -151,7 +151,6 @@ public abstract class L2Object extends ListenersContainer implements IIdentifiab
 		_isSpawned = false;
 		L2World.getInstance().removeVisibleObject(this, _worldRegion);
 		L2World.getInstance().removeObject(this);
-		setWorldRegion(null);
 		return true;
 	}
 	
@@ -229,16 +228,12 @@ public abstract class L2Object extends ListenersContainer implements IIdentifiab
 	
 	public final boolean isSpawned()
 	{
-		return _worldRegion != null;
+		return _isSpawned;
 	}
 	
 	public final void setSpawned(boolean value)
 	{
 		_isSpawned = value;
-		if (!_isSpawned)
-		{
-			setWorldRegion(null);
-		}
 	}
 	
 	@Override

L2J_Mobius_3.0_Helios/java/com/l2jmobius/gameserver/model/actor/L2Character.java

@@ -1665,6 +1665,10 @@ public abstract class L2Character extends L2Object implements ISkillsHolder, IDe
 		
 		// Cancel all timers related to this Creature
 		TimersManager.getInstance().cancelTimers(getObjectId());
+		
+		// Set world region to null.
+		setWorldRegion(null);
+		
 		return true;
 	}