Q: Streaming music through bluetooth

When I am in my car and my phone is connected via bluetooth, for some reason the phone works through the bluetooth, but if I am playing music it only plays on the phone speakers and I don't have anywhere to choose the the bluetooth output. This is a new problem as it used to be that when I was connected both the phone and any audio output went through bluetooth, but now I can't get the music to work. In the past, there has been an icon in the bottom right corner that I could toggle between the outputs, but that is gone now. I would think that it is a problem with the connection except, as I mentioned above, the phone feature works fine.

Any help would be greatly appreciated.