This very old topic isn’t really the right place to write about a current issue, but are you running v1.22.0 by any chance? If yes, then this kind of file “undelete” behaviour on move/rename looks like the bug that I experienced in https://forum.syncthing.net/t/keep-getting-conflicts-generated-on-android-device-for-files-modified-only-on-a-desktop-pc/19060. The fix is available in the current RC, so if that’s indeed the culprit, then you should either enable upgrading to release candidates, or wait for the next stable version sometime in the beginning of November.