If you try to sit on an Arcane Tower Apex throne, and you click on the chair if you're not directly in front of it (especially if you're behind it), the auto-pathing freaks out and will start trying to walk you through the chair. Most of the time the auto-pathing gives up and you'll be stuck in the chair, but sometimes it keeps trying to run back and forth around the chair, and if you interrupt it, you'll also be inside the chair.
To re-create the bug, click on the throne from the back. If you click on the chair from the side, sometimes the pathing breaks as well.
I don't remember this always being an issue, I'm not sure if this has to do with NWN changing how it calculates pathing.
