I've had a game with similar issues. It happened in the start-cabin for me, and I recreated the charaacter and it was fine.
I suggest two things. First, read the "how to submit a bug" -thread at the top of the forum. It may help them track down the issue, given how it's not easily reproducable. Second, when it happens, load a savegame from before it happened while we wait for a fix.
