Yes that helped a lot:
IcyHeaders: name="Airsonic", genre="Mixed", bitrate=-1, metadataInterval=20480
ICY: title="Cowards Way", url="null", rawMetadata.length="26"
Your server sends ICY data when playing the media …
So Symfonium uses that as if it was an Internet radio, because ICY data is supposed to have the proper data.
You need to see with the server why it does that and how to disable it.