Hi @benfury, is this the same issue that you reported where you had a "menu screen burn-in that would not go away till I changed screen resolution"? You've found some helpful clues here. I just want to make sure I capture it all in the right bug reports.
Also, when it goes silent, is everything locked up, or do the controls still move? Does the DAW lock up?
And if any crash logs are ever generated in Windows, that can really help.