artist tag not displayed via Lumin CP on Linn DS

[FransZappa]

There seems to be a problem with the tag display on my Linn Majik Ds when I use the Lumin CP.
The DS does not display the artist but instead shows the composer tag.
This does not happen when I use the Kazoo CP (which I do not like so I prefer to stick with Lumin).
So I am not sure whether the problems lies with Lumin ór Minimserver but I guess it has something to do with the tagcustom property and I was hoping someone could either verify this and have a solution or.... well some other advice I guess.
the tagcustom is currently:

AlbumArtist.displayRole={artist}, Composer.displayRole={artist}