Same issue here. I am constantly driving with navigation and talking on the phone so this issue annoys me every time I get into my truck. I even traded in my samsung s21 ultra thinking maybe iPhone was better, and it’s pretty much the same. Calls switching to handset, then back to the deck, then handset again, losing navigation mid route, and the music. On my 45 minute drive from the job today it cut out 6 times. Usually carplay turns back on within a few minutes, and other times it takes a good 15/20. So sick of this it is making regret spending so much for a gmc. I liked the ford I traded in better.