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Reply to Big Sur update is causing extensive screen flickering
I have a similar (/same?) problem. Two displays. When opening some embedded pdfs and trying to view in Acrobat it's like the computer can't decide which display to view on and jumps between the two causing a flickering. And sometimes open app windows show when I view Mission Control but they do not appear on either display when I try to access the window, which isn't great!
Dec ’20