Hi All!
After experiencing this, it driving me nuts, and searching for hours for a long-term solution, I finally found one that works and thought I’d share here for all.
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The “–disable-gpu” target for WeMod app shortcut, suggested in many similar posts, often resolves the issue. However, it seems to get reset/erased when the app updates.
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For a broader-reaching, longer-term solution, the (or at least a) root issue appears to be Microsoft Windows ‘MPO’ misbehaving, not necessarily a Nvidia or AMD GPU issue, as often suggested in various forums. For me, this flickering was also happening with two other desktop apps/programs, and this solution instantly fixed them all for me.
It’s from this random 3-year-old Reddit post, which contains a Nvidia link from their support, as well as the instructions to DIY the 30-second regedit addition to fix this (I chose to directly add the entry myself).
Updating this post to include the regedit entry to add here, in case something happens with that post/link:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Dwm, create DWORD OverlayTestMode with value 00000005 (seven 0’s), then restart your computer.
To reverse this, in case it doesn’t resolve the issue or causes others for you, simply delete that regedit entry and restart your computer.
I hope this helps all who end up here who are having this issue(s). 