ALL doors are bugged, you can walk through most of them if you get to them before they are rendered and some even after.
On that note, there's some doors, in the druid grove in particular, that when you lockpick them and enter you might get stuck in some sort of state as if you are in a dialogue cutscene and you can't save your game. This happened to me a few days ago and I had to go reload 1 hour back. That was before 2 of the patches though, so maybe it's fixed now and I did report it through the ticket system.
