Two days ago (20/04/2021) my desktop started showing flickering while playing League of Legends , so I looked for new updates of the AMD Software to see if I could fix the issue , after downloading the new driver 21.4.1 it just got worse . Now the fps drop is going crazy and the flickering and stuttering while in game won't stop specially after I Alt+Tab changing tasks . I went on the Release Notes and this is marked as a Known Issue but there isn't nothing I can do , can somebody help me out with something pleaase ! Thanks !
Se my thread here about Microsoft Windows 10 latest update KB5001330 causes frame Rates to Plummet, screen flickering and BSODs.
Perhaps this is causing the problems that You are experiencing?
If that is the case: pause Windows update, uninstall KB5001330 and wait for Microsoft to come out with a new KBxxx to fix the problem.
Instructions how to do this is also in the link above.
Best regards from Sweden