I also have a 3900x. I have noticed that when my PC tried to go to sleep all my fans shots up to 100% and just stayed there. My RGB lights reset back to that factory orange and my PC become unresponsive. I haven since disabled sleep, but when I get home I will try again and report if any meaningful codes appear via debug LED. Do note this was on my Master board, I have the Xtreme now but still haven't tried putting it to sleep. Still I will test when I get home.Is this only 3900X? Anyone else with another CPU? Just to be clear just go to start -> sleep then it won't resume? Does the debug LED say anything? What board?
Personally I only have 3600X right now to test, but if I can gather enough info to try and reproduce I can have HQ test.