That’s very odd. I’ve used my phones with 3 different cars regularly using CarPlay every single time I drive for literally a decade without ever experiencing that.
So I own a new Honda and have either borrowed or rented GM, Chrysler, Toyota, Nissan. If you've only driven say Ford, BMW, Hyundai, Mercedes, VW, I didn't test those.
This isn't like Linux where the combo of motherboard, kernel version, and day of the week affects your Bluetooth audio, but ok cause n=1. Apple stuff is supposed to just work. Most of it does, but not this.