I deleted a single player survival world and and created a new one. The Music from the world I deleted was still playing. It was even playing at the same different music in the new world was playing. This happened to me many times.
MC-101506
Music Bug
Resolved
Duplicate
0
Samuel Rogers
(Unassigned)
Unconfirmed
Minecraft 1.9.2
Retrieved
Duplicate of MC-35856, if you have not, please use the search function in the future to see if your issue has already been reported.