Bluetooth UHP IOS 14.2 problem iphone 12

Iphone 12 new with bluetooth handsfree UHP, Cadillac,Opel,Saab.
connect ok, receive and make calls ok, but when you will end the call, the sustem of the car turns crazy, sometimes loose conection, sometimes freeze the call on the car but it’s ended on the phone.
several test done, changing configuration on the phone,with no result,
The most surprising it’s thats if the person tbat makes tbe call to you end the call, everything it’s ok.
same car eith iphone 11 Ios 14.1 works fine
ahy thoughts about?

Mee too in an Opel Astra 2010, with an iPhone 13

Same here, iPhone 12 and 2007 Opel Signum

Same here, iPhone 12 Pro and 2016 Opel Antara. Phone calls works fine, buttons on car wheel act odd, but must important: NO Navigation app connects via bluetooth to provide driving directions (Waze, Here we go, Apple Maps, Google Maps etc.). Clever if you think that use to be called "handsfree"...

Bluetooth UHP IOS 14.2 problem iphone 12
 
 
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