I believe that my 2024 polestar 2 suffered a critical failure with the parking brake/weight sensor interlock. While parked in my driveway, (on incline) I parked my vehicle, opened the door (which should also engage the parking brake) and exited my vehicle. The vehicle at this time appeared to be in park. I closed my vehicle door, walked away, and approximately 4 seconds later, my vehicle rolled in reverse to the bottom of my driveway. I acknowledge that there is snow on the ground as seen by my security camera. However upon additional review, it is clear that this was not a traction issue. The vehicle did not slide down my driveway. You can clearly see the front tires spinning when zoomed in. In addition to filling this report, I intend to contact the dealer which I leased the vehicle from and request an inspection to confirm any potential mechanical or software failure. I was injured while running after my vehicle when I slipped and fell as seen in my security camera footage. This form ds not allow for video uploads. Please let me know how to send the footage.