That directories reappear empty thingie was an sync engine issue, I believe. It was fixed in latest sync engine update (though this issue was never mentioned, i

That directories reappear empty thingie was an sync engine issue, I believe. It was fixed in latest sync engine update (though this issue was never mentioned, it stopped happening). Regarding the parent poster, on Windows Smart Sync is enabled and, while extremely useful (and better that Onedrive’s equivalent IMO), it did cause issues in the past. Since it seems to work as a file filter, it can cause some issues. That being said, I haven’t seen those in a while.