I noticed this error with the 8.1 version (maybe it was also present with the previous ones).
I have this release in musicbrainz:
under “arranger” I find “Alter Bridge” while under “strings arranger” I find “David Richard Campbell”
when launching the update, songkong modifies the “arranger” tag in this way, eliminating “Alter Bridge”
This is wrong. If it really had to eliminate one, it had to remove “David Richard Campbell”