Go to this thread and submit the data they are requesting.
There are similar reports of a potential memory leak where over time the VRAM maxes out and even exceeds the GPUs cap. Have you tried to monitor your VRAM while playing?
For me crashing is fixed. Will test today because I plan to play a lot. But I am sure I had many sessions that where longer than 6 hours after the patch. I did not crash for a long time.
EDIT: I just crashed in town again… But this time it happened after longer playsession like 9-10 hours.