When I get audio files from various sources, often these files are incredibly buggy, including malformed tags.
Previously, I was just opening these files with Mp3tag and "Ctrl+S" them to rewrite the tags. But this is not sufficient and there are a lot of leftovers in the file source.
My only solution so far, is to copy elsewhere the tags' content, then completely delete the tags and finally write them again. This is quite a long process.
It would be very convenient if an action were added to Mp3tag, that would memorize all the recognized tags, completely delete the files' tags and finally write them back, from scratch.