I've looked online about the issue and it seems to be a recurring one. As it stands, I've been playing Minecraft since PE came out, and I've played it on multiple devices: with and without Xbox accounts. I've never once had the jukeboxes work properly for me. 

I have the vanilla music free dlc downloaded, but pigstep doesn't make a sound when I play it. None of the music discs I put in ever come out of the jukebox, whether I'm in creative, survival, and even adventure mode. I've tried it on several different worlds and different modes. I went exploring until I found a music disc and a diamond to make the jukebox in survival—it plays and disappears. I've tried gamemoding into creative and getting another, then playing it: nothing. It doesn't matter whether I tap on it to get it to stop playing or wait for it to finish, I still never get a disk back.

I love the minecraft soundtrack, and I'm the kind of person who doesn't like silence in a world. It's upsetting that I've never been able to get this to work on PE, and I unfortunately can't afford to pay for the PC version just to get working jukeboxes.