Bluetooth connection to car fails

Hi, I have a Sony Experia XA. I can connect the phone to the car via Bluetooth but the device sounds (phone calls etc) does not come through the car speakers but us the phone speaker.

I have looked through various web site help pages and found that the Bluetooth setting "Phone Audio" is not ticked. But when I try setting this option the tick will not save. I found if I reboot the phone the tick is set. That is until I try to connect to the car again when the tick has disappeared. Or even if I turn off Bluetooth and turn it back on again to connect to the car then the Phone Audio is unticked and will not accept my changing it.

I have tried with my second car and even a Sat Nav with Bluetooth and all have the same problem. So this looks like a problem with either the phone or Android.

Can anyone offer any help?

 

Thanks for the reply, but the phone (tick box) sets OK when I reboot and un-sets before I have chance to connect to the car. Plus it is the same with 2 cars and a sat nav device??

I'm begging to think there is a bug with Android/Sony!

Oh and one is a Vauxhall Astra (2017) and the other a Peugeot Boxer. Both vehicles worked fine with my older Windows phone.

Oh and just to add. The Bluetooth connection remains and I can still control the phone from the steering wheel but the call sounds are from the phone only.

My first Android after having Windows phones for 5 years - I'm not impressed.