sound control on the mobile was off. I tried to adjust the music volume, but the sound control, usually on the right side of the navigation screen was not visible.

also tried via the menu, background volume, which had no effect on the music volume.

only by adjusting the mobile volume itself it worked. By selecting the buttons for volume adjustment on the mobile, the control bar for the volume appear on screen. can this be done directly somehow? 3 clicks upper right corner?

there should be audio (in and out) controls available at all times,