I had a blackscreen issue when playing games with multiple screens. I fixed mine buy useing the eyefinity setting in radeon 2020 version 1.1 instead of useing display settings in windows 10 OS. One problem i did find with this that when streaming all my sources had to be in windowed mode to get full utilisation of both monitors with my streamlabs OBS, Twitchtv and the game i was streaming. I also found that undervolting the gpu helped with overheat. Haveing to play all my games in windowed mode was an issue but I got used to it especially since I wanted to use the second monitor for my broadcasting software.