Hi, I have the same problems on each program. Sometime opening and existing documet, the name of it is showed in the main bar and also I can see it on the navigator thumbnail preview in the contol pannel, but really it does't appear and I cannot work on it. The only way to solve it is close the program and start it again. The second time the document will be showed as normal. This issue is random and is not linked to version of the progam (Illustator or photoshop). I also reset twice the preferences in Illustrator but no solution. I can work for hours with 4 o 5 document open in the same time and "puf" the 6th documet give the problem. I can only close every docume (that are hidden) and star again. When I close the diffent document the program ask me to save or not if i made some changes. I run on iMac 27" 5k 2017 Mojave 10.14.6 - Illustrator 2020 24.1.2 - Photoshop 20.0.7. I work on iCloud file
Thank you for your suggestion, but it 's not a connection problem with iCloud, nor connected to latest release of the program. I discover a news, when the hidden document is open and I click on green + botton (like to fit to screen the document), it suddendly appears.
But the problem persist when i clik on another opened document in the back (always in photoshop). It seem to be a view problem.... really I don't understand, today is terrible, the problem continues