U4-Hythloth-L6-Room-7

The chests here are mimics. However the starting locations for players in this room is the upper left corner no matter where you actually enter from. This blocks you from exiting to the east and thus getting to the ladder going down.

Exiting from the upper left will cause you to be in a wall but you are able to reenter the hallway from there without a problem.

A patch for the problems in the level 6 rooms is available here: Ultima Aiera Hythloth Patch