It's a bug. When I've seen it it's always been on the 2nd+ attempt at a level, is this the case here too? My guess is that for one player the client doesn't refresh the door variables, so doors remain in the same state they where in on the previous attempt.

I see one time that. Drill still work but door is open in 2 min after start. One guy use cheats, so maybe its not bug.

I've seen something similar in a youtube video. For one guy, the door appeard open and he could walk inside and do whatever. But only him. Definately a bug (or well.. as far as I know, at least)