Hello Tom,
Few queries, what document size are you working on. Kindly share the GPU details with us. Are there any other programs running on your system like some screen recorder which could case this isssue? If yes, can you try after you close them.
Can you do a quick pinch on the canvas and see if the canvas area comes up?
We haven't seen this issue and would need little more information to assist you.
Regards,
Rohit
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