Music continues playing when music slider is turned off

Music still plays when the music slider is turned off. I played around with the other sliders as well and the music stayed on when everything but the Master Volume slider was off.

Link to the video I made about it:
https://youtu.be/JVf6aa3tNSk

One thing that I didn't do in the video was slide the Master Volume bar, but when I do the music does adjust to that volume level.