Creature X and Y coordinates should not be both set to 0.

L2J_Mobius_10.1_MasterClass/java/org/l2jmobius/gameserver/model/actor/Creature.java

@@ -5418,6 +5418,12 @@ public abstract class Creature extends WorldObject implements ISkillsHolder, IDe
 	@Override
 	public void setXYZ(int newX, int newY, int newZ)
 	{
+		// 0, 0 is not a valid location.
+		if ((newX == 0) && (newY == 0))
+		{
+			return;
+		}
+		
 		final ZoneRegion oldZoneRegion = ZoneManager.getInstance().getRegion(this);
 		final ZoneRegion newZoneRegion = ZoneManager.getInstance().getRegion(newX, newY);