2024 LEXUS ES Vehicle Speed Control Problems

The vehicle's speedometer shows an inaccurate reading, up to 7MPH less than the actual speed. This has been verified multiple times, measured against WAZE and a speedometer app. At lower speeds, i.e., less than 30MPH, the divergence between the speedometer and the true speed is 1-3MPH. At medium speeds, between 40-60MPH, the divergence is 5-7MPH. At highway speeds, the speedometer initially shows the same larger divergence but after several minutes starts to converge to within 1-2 MPH of the apps. The convergence disappears shortly after the vehicle slows down. The vehicle was brought into the dealership for repair but they said nothing was wrong. At that time, I was provided a loaner vehicle of the same make and model, and its speedometer matched WAZE perfectly at all speeds. I then contacted Lexus customer service, who opened up a case number. I uploaded photos and videos to Lexus documenting the problem....