No tracks in album, when browsed via artist

[KilburnTowers]

Hi, I'm completely new to minimserver and this question is presumably out of ignorance! I'm also fairly new to MAC and found this software per chance after I couldn't get Firefly to work (which I had on my Windows PC)

I'm running the minimserver on MAC and I'm using a Pinnacle (Roku) soundbridge as the client.

If I browse the list of artists, I can see the songs by that artist.
If I browse an album, I can also see the songs within that album
HOWEVER, I browse the artist and then browse the album within that artist on my soundbridge, it returns an empty list

e.g. if I browse The Beatles on my soundbridge as an artist and look up "All Matching Songs", I'll see every Beatles song I have. I will also see the album called "Revolver" but when I then look into "Revolver" there is nothing there. However, if I browse Revolver directly as an Album, the songs are there.
Here is a subset of the log, when scanning the directory:


Scanning directory David Gray
15:20:57.717 main: provisionally retaining cache entry for 'iTunes/iTunes Media/Music/David Gray/A New Day at Midnight/'
15:20:57.717 main: no cache entry for folder 'iTunes/iTunes Media/Music/David Gray/'
Scanning directory A New Day at Midnight
15:20:57.719 main: album=A New Day at Midnight albumArtist=David Gray artistType=4
Scanning directory White Ladder
15:20:57.721 main: album=White Ladder albumArtist=David Gray artistType=4


I'd be so grateful for any help!