Problem with multi-disc albums on Naim app

[guildenstern]

I have posted this issue on the Naim forum, but all replies so far are telling me that the problem is in MinimServer. I don't think that's the case, but as I would very much like to solve the problem, here goes:

I'm using Naim app on iPad to control a UnitiQute2. Streaming from Synolgy NAS running MinimServer. I've ripped hundreds of CDs, some using dbPoweramp, some via iTunes. The Naim app is doing strange things for multi-disc sets. Generally, all is well for Disc 1 but for Discs 2, 3, etc., the Naim app lists each track as a separate, discrete album, showing a separate album cover image for each track.

In another system, I use an Auralic Aries streamer, and Auralic's iPad app (called Lightning DS), which also runs via MinimServer, does NOT have the same problem. It lists each album in a multi-disc set with tracks in order. Also, two other apps, Linn Kinsky and Linn Kazoo, both referencing MinimServer, are correctly displaying tracks for albums in multi-album sets.

So, can anyone help me figure out how to make the Naim app properly organize and display multi-disc sets? Thank you.

Attached:
(1) Screen shot from Naim app.
(2) Screen shot from Auralic Lightning DS app, same album.
(3) MinimServer Properties: Server
(4) MinimServer Properties: Advanced
(5) MinimServer Properties: System