I just experienced this as well, but didn't connect it to the owlbear scene. I thought it was because we were doing partial long rests to try and clear any cutscene backlog. It may well be related to the owlbear though because we were at the same spot in my game. Changing campsites didn't fix it either. What did work was doinga full rest using supplies instead. Only then were we able to rest. If you're already trying a full rest, and failing, maybe try doing a partial rest instead?
