Adobe's file sync never work perfectly on our Mac but the new 2020 CC Client (the more app-like that isn't attached to the menu bar) is a disaster in terms of synchronizing files! And this is THE ONLY FUNCTION that it should perfectly master!
Even a complete uninstall with Adobe's own CC-Uninstaller and the manual deletion of all files in the cloud (In Files and in the Trash) as well as the complete reinstallation doesn't solve the problem, because the newly installed client immediately starts to restore the deleted files on the desktop.
Where does it get them from, when everything should be completely removed and the cloud is empty? A good question!
This applies to the CC client under mac os 10.15.1 as well as 10.14.x.