The same thing happened to me when I started a car. A few seconds later when it was connecting to ApplePlay an explosion occurred. I thought something blew up in the car. '22 Tremor with Unleashed sound system.
It happened to me when it tried to connect to ApplePlay a few seconds after I started. I almost crapped myself thinking something blew up inside the truck. Hasn't happened since.
My friend has it on his RAM 1500 and absolutely loves it. I've seen in in action and it takes a sec to get used to, but once you do, it's a great feature.
New from Long Island, NY. First truck ever, F150 Tremor 402A. Was waiting for a Platinum, but walked into a showroom and saw the Tremor they just got. Got it within 5 min. Coming from a Volvo XC90 SUV and never having owned a truck before, I am in love!