Do you have the same issue if you connect your ROG to stereo at home? If not, then I still recommend you to buy a ground loop noise isolator. They're really cheap.
At home and in other cars everything is ok, but I don't thi...
Sounds like you just need to purchase a "ground loop noise isolator" for your car. This is a VERY common issue for all phones and AUX sources
So far the issue appears to be only with my ROG phone does it make any sense ?