I got something I would like to test with those who are still experiencing black screens.
1) Open your AMD Radeon software (Radeon settings).
2) Click the Gear icon in the top right.
3) Click the General tab.
4) Scroll down to the bottom and find "Preferences"
5) Turn off In-game Overlay. Has to be done here and not just CTRL+SHIFT+O.
So, I've been running without the overlay active(like I described above) for ages and had no issues with black screens. Then yesterday, trying to figure out some stuff with a game, I turned the overlay on and boom 10 minutes in I got a black screen. Then it happened again half an hour later roughly with the same game. Got fairly annoyed and turned the overlay off(like described above, not just CTRL+SHIFT+O, and not a single black screen for over 4 hours playing the same game. So my suspicion here is that the silly overlay could be causing black screens.