Wireless Android Auto not working on ASUS Zenfone 8 (but does with other phones)

I have an ASUS Zenfone 8 running Android 13. When I try to use Android Auto in my car, it only works when I connect via a USB cable. My car supports wireless Android Auto and this does work with other Android phones, but no matter what I try the Zenfone just won't play ball. The phone recognises that a wireless AA connection is available and asks me to "continue on my car screen" but nothing appears on the screen. Even if I try to force a connection via the car, it just says "connection failed". The car pairs with the phone via Bluetooth no problem, but just won't launch wireless AA. As I say, it has no problem with other Android phones so this must be Zenfone specific. Any ideas would be appreciated.