Not sure if this is a bug or not, but occasionally when I roam around and explore, pigstep starts playing and I have no idea if it's coming from one certain place or if it's a bug... Can anyone explain this?

This is most likely from a mob with a backpack that has a jukebox upgrade.

This is most likely from a mob with a backpack that has a jukebox upgrade.

it just happened again, but I was in the middle of the ocean on a boat
I looked everywhere for mobs, but none were here