2020 Honda Civic drivetrain & axles problems

I turn my car on To go to work realized I didn’t have my phone. Car was in park. I hadn’t touch the gearshift at all I get out of the car. Approximate 20 seconds after I walk away from the car, my home security camera shows the car creeping extremely slowly backwards up into my driveway going up across the crown of the road… across the street and falls into a 10 foot deep ditch. I am 100% certain that Car was in Park… There were no sounds when I open the door to alert me that it would be anything other than park..

The contact owns a 2020 honda civic. The contact stated while driving at an undisclosed speed, the manual clutch failed to allow the vehicle to shift above 2nd gear while entering the highway. The contact revved the engine however, the vehicle failed to accelerate. The contact was informed that the flywheel inside the clutch was damaged however, the part for the repair was not available. The manufacturer was made aware of the failure and opened a cause.