Not long after halting the rollout of a Windows 10 feature update for the first time ever, Microsoft has finally announced that the cause of the user content removal bug — which affected only a few users who installed the update — has been isolated and a fix is rolling out to Windows Insider Program members.
https://www.notebookcheck.net/Microsoft-fixes-the-troublesome-Windows-10-October-2018-Update.337828.0.html