In creative mode whenever I attack a endermen in the end or any endermen in general, they keep teleporting all around the map and never stop unless they die by being on fire. Now I am using the to many items mod and gave my diamond sword attack 10 fire aspect 10 punch 10 knockback 10 unbreaking 10 looting 10 and flame 10. I don't know if the sword was the problem or because of the fact that they were on fire made them teleport till no end, but hopefully mojang can fix this.