Booklet view failures on classical albums

[twieatminim]

On 10/23/23, twieatminim wrote to Bubblesoft:

RE: RE: Booklet view failures on classical albums

To your answer ...
> The problem is that for tracks part of a group, MinimServer set their album UPnP metadata it sends to the app to the group name, ...

I tried to understand it and I've checked it with the foobar v2.0 player and the extession "UPnP/DLNA Renderer, Server, Control Point" (foo_upnp) v0.99.49 developed by Michael Pujos (aka bubbleguuum).
This extension lists all the metadata tags I received via UPnP from my Minim-based music server.

When I check the "ALBUM" tag of the faulty listed classical music files (gotten by foobar2000 via the extended UPnP Browser), then all ALBUM tags still show the correct album title, not as assumed the "group name". In this case, they are not be "overwritten" by Minim Server as you've assumed.

So, now there're the questions:
- Why did the UPnP Browser extension of foobar2000 get the correct album names via UPnP and ...
- why did the BubbleDS app got different ones? Both were read via UPnP?!? :-(

I can't find an explanation for it. I also don't know which component (Minim Server, foobar200, BubbleDS) fails on preparing the album titles.

Could you please give me a hint on how I can identify which component could be responsible for that fault?