Is there a known issue with macOS Finder's local USB file sync?

Others and I are having problems with our local offline USB synchronizing our calendars in the recent macOS versions (started in Ventura) and iP* devices as shown in these links:

https://talk.tidbits.com/t/my-mac-apple-calendar-went-berserk-i-need-help/23878/39

https://discussions.apple.com/thread/254982807

https://discussions.apple.com/thread/254549186

https://discussions.apple.com/thread/254463571

https://discussions.apple.com/thread/254650642

https://discussions.apple.com/thread/254890299

https://discussions.apple.com/thread/254876661

etc.

We reported this to Apple too with our bug reports, but nothing. We don't want to use clouds too.

Thank you for reading and hopefully answering.

Is there a known issue with macOS Finder's local USB file sync?
 
 
Q