Discogs Update not respecting dont add certain fields:
artist, album, title
Occurs if file has no such metadata and Match Ignore Existing metadata from Filename is not checked. Then SongKong uses the filename to try add basic metadata ignoring the option.
Also Grouping added, Classical issue
Also Artist Discogs Url, unless incorrect mapping with Artist Official Url
is classical is also added regardless of option this might be needed for classical processing, not such an issue