Massive Creative Cloud Sync Problem

Hello,

a client has massive problems with the synchronisation of data via the Creative Cloud. Following situation: Graphic designer has an iMac in the office (MacOS Mojave) and a Dell notebook in the home office (current Windows 10), both use the same Creative Cloud account.

The installation and setup of Creative Cloud on the Dell notebook went without a hitch, Creative Cloud content was synced to the notebook. Directories and files that are subsequently created on the Dell notebook are not uploaded to the cloud, or at least not reliably. In Windows Explorer, the files are marked accordingly "uploading", but the Creative Cloud app says that the synchronisation is complete. Files and folders created or uploaded in Creative Cloud Web also do not appear on the notebook. There is no error message.

We then deleted the sync history. Afterwards, the data was synced correctly, but only the first time. Afterwards, we had the same problem again.

We deactivated the virus protection and the firewall as a test, but no change. We created a new account - first synchronisation complete, then the old problem.

It is also noticeable that the CoreSync process (yes, it's genuine) and Windows Explorer regularly cause high CPU load. For example, after restarting the notebook or after pausing and restarting the sync.

Adobe Support now says that this is due to the iMac with macOS Mojave. If we upgrade to Big Sur, this would solve the sync problems on the notebook. Is that realistic?

I'm grateful for any tips or advice!

Greetings
Markus