This has been done to death - there are dozens of threads about this and hundreds of posts.
That said, this...
That said, this...
... is weird and certainly not the case in my car. I would try resetting the audio subsystem (press the reset button at the bottom of the equaliser page), then reboot the infotainment system (press and hold the line at the bottom of the screen until it goes completely blank - keep it held even after you see the screen cleaning message come up)