P: Default thumbnail icon for the recently added Library assets (instead of the actual one)
Hey!
It happened few days ago: I turned my Photoshop on, launched the Libraries, added something and... instead of a regular asset preview image I saw a default thumbnail icon, like this:

Few additional notes:
- Turning Photoshop/computer on/off doesn't help,
- Reinstalling Photoshop (both soft and hard, with all the settings removal) doesn't help,
- I'm sharing this library with someone else - when he is uploading something, it works fine, the thumbnails look correct on my side; also, when I'm sharing something, it looks correct on his side.
- If I'm dragging something from the layers palette or from the Photoshop canvas into library, the thumbnail is wrong (default), when dragging from outside the Photoshop (file explorer) directly to Libraries, it works correctly.
- Web view (in a browser, under the link you can get via "get link...") is correct, all the thumbnails show an actual design.
I din't reinstall an entire CC app yet since I want to avoid it - don't want to install and set up everything from scratch.
It's Windows 10 Pro, 64-bit, Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz 2.59 GHz, 32 GB RAM.
I’d be obliged for any help.
Cheers,
Lucas
