xEGxTigerSnake

Hey so I made a horde base using robotic sledges to know zombies down off a bridge. It works pretty well for a bit, but then the sledge teleport to directly below where I placed them, all the way to the ground. They don't get destroyed or anything which makes me a bit confused, so I'm thinking they keep clipping through the concrete block I placed them on. Is anyone else having this issue in A20 at all?