Every once in a while the display brightness (of the A/V system's display) goes on the blink. It behaves as if someone continuously pushes on the Brightness touch control -- cycles through regular brightness, slider, dimmed, off, and then all over again. The only way I've found to make it stop is to turn the engine off and back on. I think that usually this starts happening following a specific event, probably low blinding sunlight. Is this happening to anyone else?