Thanks for the feedback. Currently, the alien will only attack a crewman if they're on their own, and will run away if there's more than one. I've never noticed it get stuck, but I'll see if I can recreate it.
ive seen the alien get stuck on the ladder that leads down to the shuttle/lifesupport section of the ship, if you go there with everyone the alien will retreat, if you wait there the alien will keep coming back until he dies/kills everyone
also androids are bugged, if there is a android in a room and you kill him he keep dying over and over, dropping tons of copies of their body and somehow killing the people in the room??