It’s a sync system bug. Read through the last few pages and you’ll see the discussion and info on it.michael-hull wrote:I don’t think this speed difference is a Waze problem, but rather iOS/CarPlay problem. All GPS speeds are off within seconds of plugging my iPhone X into my 2018 F150.
Find and install v3.0.19119 unofficial sync update and it fixes it
Re: Using Waze with Apple CarPlay