Something is seriously wrong at MSFT.
https://www.thurrott.com/windows/windows-10/189344/windows-10-version-1809-s...
The re-release of the "Feature Update 1809" i.e., the new version of windows for September '18, hence 1809, is deleting user's data, again.
I strongly recommend you turn off Updates as best you can. I've set all our machines here to "Metered" connections and set "Feature" updates to a 365 day delay and Security updates to a 30 day delay.
I think Windows has gotten too complex for MS to understand. Shadow directories and fake redirections and everything dependent not on the OS or the File System, but the Registry, may just be a step too far.