For post_type=attachments, [guid] must be [url] not something else.
Incorrect data breaks some galleries and anything else that would expect to get the url of the file from there.
in media-file-renamer\media-file-renamer.php li~106
// The GUID should be updated, let's use the post id and the sanitized title. //[alx359] That's not true for post_type=attachments|post_mime_type=image/*. The expected GUID here is [url] //$post['guid'] = $sanitized_media_title . " [" . $post['ID'] . "]"; $post['guid'] = $meta["url"];