I first encountered this bug when walking downstairs in the Kraken's Eye after resolving the rent dispute. In that particular case, Eder was unaffected, but the rest of the party could not path to the door. Since I could get to the bar, I made an adventurer and that newly created character could also not path to the door.
I had to start over, as my auto-saves were all consumed by walking up/downstairs trying to see if that would clear the bug.
I reproduced it again in the first area when I re-started the game.
- Fast mode was still enabled during the first ship combat. (Potentially