I was using the vehicle's Autopark feature to parallel park on a public street in a normal/spacious parking spot. I selected the parking spot on the center screen and started Autopark. During the maneuver, the vehicle reversed into the parked car behind me and caused a dent (low-speed crash). I was supervising the maneuver and did not press the accelerator or brake before impact. After the incident, I reviewed dashcam footage and vehicle telemetry. The rear vehicle was clearly visible in the rear camera view. Telemetry shows the vehicle had already shifted to Drive before impact, but it continued moving backward for about 1 second and then contacted the parked car behind. Telemetry also shows accelerator pedal position was 0 and brake was not applied during the impact sequence. This appears to be an automated parking/close-range obstacle stopping failure or delayed stopping response. No warning lamp or prior vehicle fault message was observed before the incident. The issue has not been reproduced since the incident. I have dashcam footage and telemetry logs documenting the event.