Affects Version/s: Minecraft 17w14a
Fix Version/s: None
Environment:Windows 10 64bit
How to reproduce (what I did)
1. Start playing a disc.
2. Leave the world.
3. Go back into the world.
The music still plays, will stick even after leaving the world, and can't be muted.
I have attached a video that should somewhat show this issue.
Sorry if this is a possible duplicate bug.