While playing the Dank Crypt, where the undead scribes are, I levelled up during the fight (triggered by finding the button and starting the cut scene). If you level up, after the battle , the door will shut and the button becomes *unresponsive*. Happened while levelling up outside the door (unable to enter then), then tried entering the hidden tomb and levelling up and coming out of level up screen caused the party to be locked inside it.

1. I'm not sure Larian reads these forums, so if this is a bug report, you might want to make sure you post it on their forums as well.
2. I've bumped into a few "stuck" situations like that, where someone gets into a situation they can't get out of. If you want to save your playthrough without rolling back, you can always fast travel to get unstuck. It sucks, but it sucks less than a new playthrough and may suck less than rolling back to your last save.

Thanks, I paid no attention to which forums I was on. Great bug reporter I am ;)

Yes it is a bug (anytime you return to an area) not just combat or cutscenes and Larian is well aware of it

P.s yes bugs reported here in gog Bg3 forums are tracked... Several of mine have been fixed between patches and Gog allows images which makes a big help