Sometimes you hear Disc 11 when you put in the disc.
theres also another issue where if you insert the disc using a hopper it will always play disc 11
another issue involving with hoppers is that, if you took the disc out using hoppers, the music will still keep playing

mc ver 1.20.1 btw, i need this ver for the mods lel

big red flag, did you set the version to 1.20.1 in the settings?
aside from that i dont think jukeboxes are supposed to be used with discs but it works since they have a storage of their own