If you spam the jukebox with a single music disc, in which you're able to continuously place in the same music disc into the same jukebox, it will stack the song over and over, and it won't go away, even when the jukebox is destroyed(although I'm aware that separate bug has been recognized).

While funny, it can be a pretty annoying bug if spammed in a server. This occurs in single player, multiplayer servers, and realms. This does NOT occur in creative mode, only modes in which you use the same music disc.