It appears the bug that caused file deletion was related to Windows 10 users who had enabled Known Folder Redirection to redirect folders like desktop, documents, pictures, and screenshots from the default location. Microsoft introduced code in its latest update to delete the empty and duplicate known folders, but it appears they weren’t always empty. Microsoft has developed fixes to address a variety of problems related to these folder moves, and these fixes are now being tested with Windows Insiders.
The re-release will start with Insider program before being fully released to normal consumers.