I also experienced the problem with storing some git repositories on iCloud Drive. My 15' MBP is standing by for the real work until all this smoothes out. Hope you guys are having a better experience other than the iCloud sync. I'm keeping track of everything to report in. A couple times Safari wouldn't come back after minimizing and I have to open a new window. I want to love this chip, but the last 2 days have been a bumpy ride or crashes (photos, Photoshop Beta, Creative Cloud-crash crash crash) here and there and some questionable performance/flickering connected to my BenQ monitor. Like many of you, I'm going to watch them work out the bugs and hopefully do so before they release their flame thrower 16' next year. And even though I did plenty of backups before this test, it looks like the M1 is going to be a $2K test machine. Over the last few years, I've trusted iCloud to store my production files. Friend of mine has the M1 Air.same exact issues, completely different ISP. Got my 13' M1 MBP Wednesday and no matter what I do, it just won't sync files to iCloud (I tried all the stuff they take you through). And still hasn't been figured out by Apple going on months.

Whatever the case - it is clearly a bug and it is sad that FruitCo developers are not paying any attention to their own developer forum when a topic has 19K upvotes. The Git repo process and the Fujitsu sync process may be using an API call that is now no longer triggering the file to be marked for synch. Thus I am tempted to hypothesize that the cause of this issue is a change in 11.4 that perhaps deprecated or broke an indexing function of the file system who's job it is to mark files that have changed for upload. a CMD-C and CMD-P forces not only the copy but the original to upload A name change will force the file to upload adding a tag to the file will force it to upload, etc.) I also noticed that if I use a python script to place a file in the folder, or I use the command line MV command to place a file in this folder - the problem does not occur and the file uploads fine. To work around problem, I noticed that any edit (to the file that fails to upload) will solve the problem. the latest update before the problem started occurring was MacOS 11.4. Prior to Big Sur these files would immediately begin synching to iCloud the second that they were created by the scanner software. Instead it is one linked to my Fujitsu scanner that is setup to automatically deposit pdf files into this folder once they are scanned. That said, one thing different for me from others in this forum reporting this problem is that the only folder this is occurring on with me is not one synced to Git. Prior to Big Sur I did not notice this behaviour.

I have also noticed this behaviour since upgrading my 2015 MBP to Big Sur.

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