At approximately 5:50 PM on Feb 12, 2026, a collision occurred while the vehicle was under the control of "Full Self-Driving (Supervised)." While parked in a commercial lot, I engaged FSD to initiate a route home. A stationary semi-truck was positioned behind my vehicle. Upon engagement, the FSD system failed to detect the presence of the stationary truck. The vehicle initiated a rearward/lateral maneuver at a speed of 1 mph, directly striking the corner of the semi-truck. Safety Failure Details: The collision resulted in significant damage to the right rear quarter panel and associated sensors of my Tesla Model Y. Dashcam footage and system telemetry confirm that FSD was active (Supervised mode) during the entire duration of the maneuver. The system's occupancy network and vision suite failed to identify a large, stationary object within its immediate path of travel at a crawl speed. Request for Investigation: I am reporting a critical failure of the FSD softwareâs object detection and path planning capabilities. The system commanded a movement into a clear obstruction without issuing any takeover alerts or applying emergency braking, despite the low speed and high visibility of the obstacle.