I'm here trying to figure out the same problem when I'm working in Adobe Photoshop CC. A few times the past couple of days I suddenly get a bunch of empty windows with drop shadows overlaid one another and they flicker like crazy while everything else freezes up on my machine.
2017 iMac 4.2 GHz Quad-Core Intel Core i7 running OSX 11.4 Big Sur
Seahawksean
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