So in my minecraft realm, I have some mobs at my base. These mobs were causing lag for the server at one point, but then even after getting rid of them, they come back to life when I close and re-enter the game. These mobs just magically reappear out of thin air when loading back in and their drops are still fresh on the ground after loading back in the game. This also causes serverwide lag that causes input delay for all users on the realm.