I'm frequently finding that when I click-drag two selected files in Windows File Manager, the operation is only about 90% successful. I'll find that only one made it over. High enough that I don't sit and wait for a doublecheck. But often enough that it ruins the workflow which includes Dropbox.
And, yes, the one-minute of latency is back, again, with the bolt.dropbox.com UPSELLING module! This is a bit infuriating as it's a bad management decision, not necessarily a bug from the tech team.