Over the 4th I had occasion to use the radio in the accessory mode by pressing and holding the on/off button in my '16. Yesterday when I did a normal start everything booted up normally except for the radio button control (dead) and center screen (blank). The radio played and responded to steering wheel controls OK. Uh,oh, screen failure? No, just a seeming inversion of the accessory mode. A re-start cycle or two fixed the problem.