The contact owns a 2020 Nissan Versa. The contact stated while driving 35 MPH, the RPM dropped, and the vehicle was unable to accelerate. The contact stated that the RPM then suddenly increased and the vehicle quickly accelerated. The vehicle returned to normal functionality, but the failure became a regular occurrence. No warning lights were illuminated. The vehicle was taken to the dealer, who was unable to duplicate the failure after several test drives. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 5,600.