[dm21912]

If you don't add the tag then Kodi will create boxsets where

- all discs have titles &
- there are 3 or more discs &
- the album isn't marked as a compilation in the tags

I should think the third criterium needs to read that album IS in fact marked as compilation. If "Album + Compilation" is missing on MB it would be easy to amend there.    

NO... I have a large number of box sets that are NOT compilations.

Why do you keep saying that all box sets are compilations? They arent!

This IS a box set, it is NOT a compilation

https://musicbrainz.org/release/a15fd67a...25c40b7bd7


This IS a box set, it is NOT a compilation

https://musicbrainz.org/release/23854e73...7bffe793f4


This IS a box set, it is NOT a compilation

https://musicbrainz.org/release/1877489f...5f316e7c12


I have maybe 40 box sets, and only very few are actually true "compilations" (I consider compilations either greatest hits packages, of anthologies covering decades etc). Theres a handful more like "more blood more tracks" that MB considers compilations (but I would think differently)

What should be noted from MB guidelines:

The MusicBrainz project does not generally consider the following to be compilations:
a reissue of an album, even if it includes bonus tracks.
a tribute release containing covers of music by another artist.
a classical release containing new recordings of works by a classical artist.

So for instance, the Above re-releases of The White Album, Rumours, Ram DO NOT qualify as compilations under MB guidelines.

The vast majority of my box sets are super deluxe or deluxe re-releases of albums./

another example

https://musicbrainz.org/release/28b119b5...a7bc4fad52


Box set reissue of the Joshua tree with 3 discs of bonus material. Not a compilation.