room traps you inside

Welkins Reach > Bastille of intellect > C1

there is a timed door that you have to climb up to before is closes but there is nothing in the 1x1 room and the door shuts with you inside. No breakables walls, floors, or ceiling. As far as I can tell the room has no purpose. Tried the "I'm stuck" feature and it did not move me an inch.