Game freezing, lagging, & disconnecting since S2 patch

This particular issue has been cropping up for those with nvidia cards. The current solution till a better one is presented is to go back to an older nvidia driver from August of this year.

This may help most of your situation.

You can find the details here:

-Diablo 4 Crashing once every 15 minutes or less due to GPU utilization spiking to 100% - #36 by DTMAce-1687