My radio screen fails when I shared my screen on my phone, is generated by my phone

My car is a VW Virtus model 2022, with radio “VW Play” and when I paired my phone with my car, and shared my phone screen on the radio, It is usually when I use Wase, after few hours, the screen of the radio, change the color, the screen are pixeled, and some times get stuck… I carry out my car to dealer, and they said that the fault is generated by my phone, actually I have another IPhone, and the behavior it’s the same, could you confirm if maybe they are right? I mean, I do not know if that answer are correct, I enabled my phone to another type to devices and the function is normal, but in my car… the fault are present, and after they change my radio, the fault are present too… thanks a lot Apple support