Creatures Crash The Game When Attacking

Every time i set a creature to attack it crashes the game. I've tested it out with the mob setting and it works fine but the second i set it to creature the game crashes. Creatures should still be able to attack to make them feel like neutral mobs which attack other players when hit and just in general it shouldn't crash the game. I've tested it with the creature attacking the player and attacking other entities and it still crashes the game the second it attacks anything.