I have the same issue several months ago. I try almost everything to fix it. And finally wrote to Obsidian support. Support ask me about DXdiag file and video file that shows crashes. They said they try to investigate issue... after one month of silence they come back and ask me to try game again... And hurraaayyy!!! Crashes are gone, and I'm able to play game for several hours =)))
But yesterday this crash bug is back!!!
And I'm again try everything =)) And wrote to support at the end ))) That is so annoying. =( Hope final version will be stable. =(
