tharglet

Had the same glitch - you don't have to go back far, so you should have an autosave that will do (it saves 3) - but you basically have to redo the room, without leaving until that post is down. If you've seen videos, at least you can make the fight easier for yourself the 2nd time around.

Had the same bug, also had to reload an old save. I believe the bug was caused by leaving the room before destroying the post. The cow lift was reset when I re-entered (I left to get some loot I missed as I took the back entrance), so I think the room just barfs up if you leave it without completing it. I used the environmental hazards the 2nd time around, so that wasn't it.