No MP3 covers displayed on MP3 radio (Frontier smart chipset

Hello, I just switched over to serviio to share my MP3 files (on Windows 11 server) to my MP3 radios (LEMEGA with Frontier smart Jupiter chipset).
I can see all my folders and also can play the MP3 files, but no MP3 cover arts are shown on the radio display, also not in the UNDOK app.
I have tried a lot of the different supplied renderer profiles, but had no success.

What I should mention:
1.) If I stream the MP3 to other player device (e.g. Samsung TV, mconnect app, also the built in serviio media player) all MP3 covers are displayed correct.
2.) If I stream from another DLNA server (like old Windows media player or FritzBox NAS) the covers are displayed on the Frontier radio display.
But not with the combination serviio -> Frontier radio !!

Could someone help me ?
Several AI agents told me, that the Frontier chipsets are somehow “sensitive” with DLNA streaming but none of the many hints helped to show the covers.

I also made a Sink protocol of the Frontier devices and will attach it here, I have added also the device information.
Maybe this helps to give me a hint or someone will make a profile out of it.

Thank you very much.

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  Code:

http-get:*:audio/L16;rate=44100;channels=1:DLNA.ORG_PN=LPCM,http-get:*:audio/L16;rate=44100;channels=2:DLNA.ORG_PN=LPCM,http-get:*:audio/L16;rate=48000;channels=1:DLNA.ORG_PN=LPCM,http-get:*:audio/L16;rate=48000;channels=2:DLNA.ORG_PN=LPCM,http-get:*:audio/x-ms-wma:DLNA.ORG_PN=WMABASE,http-get:*:audio/x-ms-wma:DLNA.ORG_PN=WMAFULL,http-get:*:audio/mpeg:DLNA.ORG_PN=MP3,http-get:*:audio/mpeg:DLNA.ORG_PN=MP3X,http-get:*:audio/mp4:DLNA.ORG_PN=AAC_ISO_320,http-get:*:audio/3gpp:DLNA.ORG_PN=AAC_ISO_320,http-get:*:audio/L16:*,http-get:*:audio/L16;rate=11000;channels=1:*,http-get:*:audio/L16;rate=11000;channels=2:*,http-get:*:audio/L16;rate=11025;channels=1:*,http-get:*:audio/L16;rate=11025;channels=2:*,http-get:*:audio/L16;rate=22000;channels=1:*,http-get:*:audio/L16;rate=22000;channels=2:*,http-get:*:audio/L16;rate=22050;channels=1:*,http-get:*:audio/L16;rate=22050;channels=2:*,http-get:*:audio/L16;rate=44100;channels=4:*,http-get:*:audio/L16;rate=44100;channels=6:*,http-get:*:audio/L16;rate=44100;channels=8:*,http-get:*:audio/L16;rate=8000;channels=1:*,http-get:*:audio/L16;rate=8000;channels=2:*,http-get:*:audio/L8:*,http-get:*:audio/L8;rate=11000;channels=1:*,http-get:*:audio/L8;rate=11000;channels=2:*,http-get:*:audio/L8;rate=11025;channels=1:*,http-get:*:audio/L8;rate=11025;channels=2:*,http-get:*:audio/L8;rate=22000;channels=1:*,http-get:*:audio/L8;rate=22000;channels=2:*,http-get:*:audio/L8;rate=22050;channels=1:*,http-get:*:audio/L8;rate=22050;channels=2:*,http-get:*:audio/L8;rate=44100;channels=1:*,http-get:*:audio/L8;rate=44100;channels=2:*,http-get:*:audio/L8;rate=48000;channels=1:*,http-get:*:audio/L8;rate=48000;channels=2:*,http-get:*:audio/L8;rate=8000;channels=1:*,http-get:*:audio/L8;rate=8000;channels=2:*,http-get:*:audio/flac:*,http-get:*:audio/x-flac:*,http-get:*:audio/wav:*,http-get:*:audio/x-wav:*,http-get:*:audio/x-ms-wma:*,http-get:*:audio/mpeg:*,http-get:*:audio/mp4:*,http-get:*:audio/m4a:*,http-get:*:audio/x-m4a:*,http-get:*:audio/m4b:*,http-get:*:audio/x-m4b:*,http-get:*:audio/x-aac:*,http-get:*:audio/3gpp:*

  Code:

Base URL   http://192.168.56.122:8080/
Device icon   Present, 120x120
Device URN   urn:schemas-upnp-org:device:MediaRenderer:1
Embedded devices   0
Expiration timeout   1800
Friendly name   LEMEGA M2+ Kueche
Has presentation   True
Interface to host   192.168.56.200
Manufacturer   Frontier Silicon Ltd
Manufacturer URL   http://www.frontier-silicon.com
Model description   ir-mmi-FS2026-0500-0414_V2.13.19c.EX72618-1A51
Model name   Jupiter
Model number   2.11
Model URL   http://www.frontier-silicon.com/
Presentation URL   http://192.168.56.122:8080/web
Product code   
Proprietary type   
Remote endpoint   192.168.56.122:8080
Serial number   1004100c12171f2701016905ffff56ff
Services   3
Standard type   MediaRenderer
Unique device name   3DCC7100-F76C-11DD-87AF-00226143FFE0
Version   1.0