Microsoft Word Bug Causes Document Deletion in Specific Cases

A bug in Microsoft 365 Word version 2409 deletes files when saved with certain file names, prompting users to adopt workarounds.

The bug affects Microsoft 365 Word version 2409, causing files to be deleted when saved with capitalized extensions like .DOCX or .RTF and the # symbol in the file name.
The issue arises when users close Word and are prompted to save changes, but it does not occur with manual saves before closing.
Deleted files may be recoverable from the Recycle Bin, offering a temporary relief for affected users.
Microsoft has acknowledged the issue and is investigating, with no timeline yet for a permanent fix.
Users are advised to manually save files and adjust settings to avoid the bug, such as disabling the Backstage view for keyboard shortcuts.