When I save a .blend file straight in my Dropbox folder, I'll get an error message from Blender.
ERROR: Cannot change old file (file saved with @)

If you pause the sync in Dropbox, the issue disappears. Apparently, the conflict is because Dropbox takes control of the file.
But pausing the sync every time I start working and enabling it at the end of the day is not a very smooth solution.
I read about it on other platforms, but I didn't find any fix for this problem other than pausing the sync.
I need a fix for this problem because it's bugging me and disturbs my workflow.
And it would be nice if you had the option to set the "Pausing sync" at a specific time.