1) If the file was renamed and its contents changed - what should the editor do? Load the changes underneath the user? If yes: user #1 mad because now the only copy of file contents was wiped in OS, and now by the editor in what was originally a mistake. If no: user #2 mad because updating file outside of editor didn't update it within editor as they'd hoped.

2) If the file was only renamed - but renamed by mistake - to something generic or wrong: user #3 mad because original filename (which may also have been a location) is now lost.

In all cases, the optimum solution is to clearly indicate to the user that the file name or contents have changed, preserve both the contents and the filename/location, and give the user the option as to how to deal with this given their particular situation.

This should be a separate indication than that what seems to be currently offered which is to conflate user initiated changes, and OS initiated changes as the same thing. If this is the case, they are not the same thing, and this should be clearly reflected in the UI so that the user is alerted and can decide what to do.