Every single time, killing the Banites on the first floor keeps me stuck in combat permanently, even after destroying the gadgets and traps. It's so annoying.
I get around this - literally - by sneaking up to the second floor through the "back entrance". Sometimes an annoying guard spots me, but other times they are apparently elsewhere and I can get to the top and listen to Gortash and Karlach go at it a bit before he bites the dust.
