I noticed lately that a volume indicator is popping up on the left side of the screen. - It does not seem to affect navigation or music volume but can be clicked on and would turn 'off or on' (crossed out speaker) Another strange thing is that the icon is black, not gray as the other UI elements around. It took me several days until I could take a picture of the icon as it disappeared as soon as I pulled out my phone... I noticed the icon coming up when I am waiting at a stoplight and the car display is centered from the top instead of perspective. I do not have a passenger warning system installed (as far as I know) Does anybody know what this is and which volume it controls?