Jukebox stays powered for long periods after disc is finished

When using hoppers to cycle music discs through a jukebox, there is a frequent bug that makes it pretty unusable.

After the song on a disc finishes, it continues to show music note particles for random lengths of time. The disc is "still playing". so the jukebox continues to emit a redstone signal, locking the bottom hopper from pulling the disc out. 

The jukebox stays in this static state for seemingly random periods, eventually switching off and unlocking the hoppers.

I am playing on multiplayer and have witnessed this bug about 12 times in the last week.