I keep running into render issues in the new PS 2020. Here's the most recent example. I loaded a large pano into the first tab then opened a PSD file into the second tab. This second tab should show me a couch and kitchen as indicated by the view in the layers, yet it's showing me the pano from the first tab. This has happened to me dozens of times in past few days.
When I pull the tab out, it then renders the PSD correctly:
Another issue was when I went to restart the computer and had a dozen files open in PS that weren't saved. PS 2020 just closed it all out and skipped the "Do you want to save?" dialog. Just trashed the file progress.