http://i.imgur.com/W0duC.jpg
Here boffs refuse to walk through doors.
I can tell you that the boffs on the left probably don't want to walk through because the floor will disappear at one point. The boff on the right has issues because that door started off as a closed door.
We've been told how the pathing works and how its affected by objects becoming visible and invisible but are there any plans to fix it so we don't run into this problem anymore?