artist tag not displayed via Lumin CP on Linn DS

[FransZappa]

Thank you for you help Simon but I don't really understand. Kazoo handles the command correctly and Lumin isn't. I can see that on the control point itself it is the same problem, Kazoo shows the artist and Lumin shows the composer (at the top and in the playlist on the left).
I was hoping that it could be fixed with a tweaking of a commandline somewhere.