The contact owns a 2020 Ford Expedition. The contact stated while driving 60-65 on the highway, changing lanes, the accelerator pedal was depressed, but the transmission unexpectedly downshifted from eighth gear to first gear. The vehicle lost motive power. The contact stated that several unknown warning lights were illuminated. The message to Service Immediately was displayed and then turned off. The vehicle was taken to the local dealer, and the computer was reset. The vehicle was repaired, but the failure recurred. The manufacturer was contacted and referred the contact to the NHTSA Hotline. The failure mileage was approximately 20,000.