Not all Albums shown. Tagged classical music

[AmBaKlaRo]

Thank you, simoncn, for your effort and the really intensive attempt to help me. Unfortunately, this means that I cannot use your software for my classical music collection, which is a pity because the only viable alternative besides Raumfeld (which only streams its own speakers) is Synology's DS Audio, which displays everything correctly but works extremely slowly. Once again, thank you for your support.