Affects version 1.14.60 on MCBE Realms

After unloading a jukebox while it is playing a music disc (either by unloading thee chunks in-game, entering the nether, or leaving the realm), the jukebox 'freezes,' in a way.

When loaded again, the jukebox retains the disc, giving off a redstone signal but no music. The disc remains 'stuck' in the jukebox until a player manually removes the disc from the jukebox. (UPDATE: music disc will eject after the "song" has finished playing, even though the song is not audible and the music isn't actually played in-game.)

On singleplayer bedrock edition worlds, the jukebox will automatically drop the music disc into a hopper below it when the jukebox is unloaded, but this is not the case on a bedrock edition realm.

This makes building automatic jukeboxes that run in the background extremely difficult and makes them impossible to be relog-proof.

UPDATE:

Pictures below show the setup

To reproduce:

1. Place a jukebox on top of a hopper
2. Put a music disc into the jukebox
3. Unload the jukebox (either by leaving the realm, moving far away, or entering a new dimension)
4. Reload the jukebox (re-enter the realm, go close again, or go back to the original dimension)

It is seen that the music disc remains inside the jukebox, while no music is playing. The hopper underneath does not pick up the music disc, nor is the music disc ejected from the top of the jukebox. The jukebox still emits a redstone signal due to the disc still being inside, and the music disc will eventually pop out or be picked up by the hopper once the "song" has finished playing, even though the music is not audible or heard in-game.

It is expected that the music disc will be ejected (either out the top or into the hopper below) immediately upon unloading (either by leaving the realm, moving far away, or entering a new dimension), this is what I have seen in singleplayer worlds.