Not actually a bug, only about half the map's terrain is actually somewhat placed, the other half has an invisible border to prevent players from falling off the world while that half is being worked and shaped, there aren't even any colliders over there yet so without the wall players would just fall through the terrain. The game is still heavily in early development after all and making an entire map has proven to be a bit difficult, anywho hope you like it still in its early development phase, :3