[frankvw]

It sounds like your MBID tags are coming from scraping within Kodi?   My preference is to use an editor to write the tags to the files rather than trust the scrapers.

scott s.
.

I followed the recommended practice, which is to use Musicbrainz Picard to tag audio files. Picard is essentially a Musicbrainz client (it can't and won't use info from, say, Discogs so if something is not in MB you're stuck as far as Picard is concerned) and it always includes a shovelful of MBID tags.