We were just playing portal and on the route in which you take the elevator down and arrive in the room where the stairs go down, they don't go down and neither does the door open. (neither did I saw the ball going through the portals, but I didn't really pay attention to that.) This happened 2 times in a row, I can't remember if we had it before on this session. I've never seen this before so maybe this is something for Sub to look into? Could anyone tag SubDelta since I don't know how.