Problem details: Whenever I alt-tab or press the windows icon to look at a new tab and then return to osu the game is just black, the game is still running and I can still click stuff but I just cant see anything. If i try to close osu and run it again the game is still black. This problem is very recent and I have never seen it before. I also tried this to see if it would happen in other games but those worked fine. The only real way I found to "fix" it was to restart my pc, witch appeared to make the game look normal but if I ever decided to minimize the game again the same thing would happen. 
osu! version: Stable 20210520.2 (latest)
osu! version: Stable 20210520.2 (latest)