It could be nvidia drivers, since it seems to be occuring with Nvidia GPU’s.
I don’t know.
The issue really comes down to the number of bugs, exploits, miscalculations that persist, some of which are game breaking. From a hardware standpoint, I think they are working it out, but no one really knows what the problem is other than a “memory leak” or dump that best fixed by figuring out your VRAM and doubling it on the swap (I think). Someone has it posted in another thread.
TheTias and DTMace
Diablo IV has run out of memory - PC General Discussion - Diablo IV Forums (blizzard.com)