Intermittently, I'll hear a pop from the speakers and the AV (Radio) display goes off and back on again, as if it had lost power and then powered itself back on. After it comes back on it works fine until it happens again completely at random. Might happen once a week sometimes, one time I had it happen 4 times in the same day. Dealer says there's nothing they can do because it hasn't completely failed and there are no codes to look at. Anyone else seeing this?