The contact owns a 2024 Acura MDX. The contact stated while driving 55 MPH with the cruise control activated, the vehicle unintendedly decelerated to 6 MPH. The contact pulled over to the shoulder of the roadway, where the vehicle returned to normal functionality. No warning lights were illuminated. The vehicle was taken to the dealer, who was unable to duplicate the failure. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 7,000.