@Painkiller, in your tests, did you use pXent_move?
After exhaustive testing (with stripped down code, no player and only a couple of enemies and terrain) it seems there becomes something wrong with pXent_move only, the rest seems to work well. Also I think that pXent_move bugs out enemies/player only during the frame(s) the enemy get unregistered, hence why the player rarely bugs out cause pXent_move is not constantly triggered for the player but is for enemies.