I had an issue where my vega rig crashed after about 8-9 hours when I upgraded from SRB 1.8.0 to 1.8.2, I was using 18.5.1. After that I tried installing the 19.4.1 and install all the windows updates, and now it seems to be working as it should. However I do get a few shares rejected due to low diff, not really sure why though.