Hi there, Sorry to hear about the issue with Photoshop 2020, as it is glitching when you create a new file, could you please try enabling "Legacy compositing" located in Photoshop's Preferences > Performance, then relaunch Photoshop and let us know if it helps? Also, would you mind sharing some details about the glitching? Is Photoshop crashing or freezing? Also, what version of macOS are you working on?
Regards, Sahil
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