Carplay issues iPhone 15

[silvershower]

Since getting an iphone 15, when I start the car and connect the phone it seems to require a few disconnect/reconnects to get it all working. It seems to lose comms with the phone or something, and after flashing up carplay briefly it goes back to the vauxhall infotainment screen and then doesn't recognise there is a phone connected. Sometimes it does this twice. 

I wouldn't rule out the cable i guess (it's a new one as the phones are now USB-C), but it was a decent quality one. 

Another thing I have noticed is that when it disconnects from carplay, the car reports that the phone disconnects from bluetooth too.