Audi of seattle confirmed 1/22/2018 that my car is functioning as designed, but i believe this design is unsafe and undesirable. specifically, when driving in reverse using the backup camera view, if i receive an incoming cell phone call to my paired phone, the car prioritizes the telephone screen view over the backup camera screen view, which immediately disappears. backing up is of course a time when the driver's arms and hands are not well positioned to poke the "ignore" button on the phone screen.
I received a bluetooth cell phone call while backing up in reverse, and the backup camera tv screen to my surprise was overridden by the phone call screen, losing my backup view.