Jukebox stopped playing after removing or adding a ressourcepack.

What I expected to happen was...:
The jukebox continue playing after returning to the game

What actually happened was...:
When pressing "back to game", no music was played, after i put a disc in and removed a ressourcepack.

Steps to Reproduce:
1. Place a jukebox and put a music disc in.
2. Go to game menu and to options.
3. Go to ressourcepacks, add or remove a pack, and go back to the game.