Music disc disappears after finished playing

Running on an Nvidia Shield Tablet.

I was crafting in my castle while playing music from the jukebox, the song was "cat", and when the song finished playing, I went to the jukebox to eject the music disc so I could play the song again, but the music disc wouldn't eject. I looked around the jukebox, even dug a hole underneath to see if the music disc was there. It was just gone. This was in survival mode. I am furious. Now I'm going to have to hack the game and inject the music disc I owned into my inventory. Also, this was the first time I played the song all the way through, and the first time I received a music disc from a dungeon. The day before, I played the song and left my castle entirely to explore, and when I came back, the music disc was ejected, laying next to the jukebox, so I know that the eject mechanics do work correctly. I placed the jukebox in the floor so that the slot would be flush with the floor. That did not affect the disc being ejected the first time. This is a really serious bug since I treasured my very rare and beautiful music disc so very much. The music was enchanting and fun to listen to, and now I have no music....