iPhone 11 CarPlay gps issues

I too have many issues, I have an iPhone 11pro and have GPS tracking issues in all 3 of my vehicles. The VW has built in CarPlay and my location randomly runs off at times during a trip, my two other vehicles have a Kenwood and an Alpine head unit, all with the same issue. Location works good for a while , then randomly runs off to a side about 300 ft and then all **** breaks loose with turn by turn directions. Then randomly it will get back onto the correct location.

Ive tried every trick in the book, resetting everything, taking vehicles back to car audio installers for antenna adjustments, nothing works.