I just started in Honour Mode to try out the difficulty although I'm usually not a friend of such one-save-stuff. The owlbear fight got problematic and raises a question for me.

I took with me the two siblings as meatshields, quite a bad idea. First they hindered me sneaking to favorite positions, then they turned hostile on me during the fight, possibly because one was nicked by a wet spell and slipped on ice. The sister took Gale out of the fight for several rounds with a control spell, the brother downed Shadowheart and Astarion some times. In the end I decided to run away because I could not win against the two remaining owlbears and the two traitors. The owlbears killed the siblings and two of the companions. I had to use almost all my money to resurrect them. So far, so funny, so good.

Now the problem started: When I came back to the dungeon to finish the job, both remaining owlbears (mother and cup) were dead. They were alive when I left. Is this normal for the game if you leave an instanced area with NPCs left? Is this part of the Honour Mode, to deny you xp in case you left an instance to survive? If so, that is absolutely breaking all the rest of immersion the game had (they died of a heart attack maybe?) and I will surely stop playing.