I have the same unit, but its the BT version, did you get your issue on the Mazda resolved?? I have the same problem on a 2019 Mazda 3, wont auto decode the vin, and manually only goes to 20013. Autel Tech support is terrible.
Its not the car, as a loaned launch, auto decoded and was into the car in less than a minute, maybe I should ditch Autel and go with Launch/Matco. lol