Drawing manager deletes, renames or otherwise changes drawings during the add a revision line procedure. This is a major issue with no good workaround that has been known since 2019 or possibly even longer. This is a big issue especially for large thousand of drawing projects when they cannot be reliably updated with a revision line without having to review and possibly send days repairing problems caused. In the screenshots attached it deleted 47 of 48 files and replaced them with a single file that didn't even exist in this project (D11). In the backup folder it renamed them all to that same name with old behind it. To repair the damage each file had to be renamed, added back to the project, have the update files deleted, update all drawings, revision line needed to be added to each file individually then each file individually reviewed to confirm nothing changed during the update. This is not an acceptable workflow to issue a set of drawings and is an issue that should be fixed as soon as possible.