mob aggro issues

src/engine/mobileAI/MobAI.java

@@ -1446,7 +1446,7 @@ public class MobAI {
         if(mob.hate_values == null)
             mob.hate_values = new HashMap<>();
 
-        if(mob.combatTarget != null)
+        if(mob.combatTarget != null && mob.combatTarget.isAlive() && mob.combatTarget.loc.distanceSquared(mob.loc) < 90f)
             return;
 
         HashSet<AbstractWorldObject> inRange = WorldGrid.getObjectsInRangePartial(mob.loc,60.0f,MBServerStatics.MASK_PLAYER);