The contact owns a 2018 Ford F-150. The contact stated that after stopping the vehicle, the vehicle would not immediately restart. Also, while at a stoplight with the Auto START/STOP feature activated, the vehicle did not immediately restart after depressing the brake pedal, and the vehicle had to be jump-started. The vehicle was taken to the local dealer, who indicated that there was no issue with the battery and was unable to determine the cause of the failure. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was 102,602.