The vehicle made contact with other vehicles twice within a short period while Full Self-Driving (Supervised) was engaged, and it did not respond to my attempts to intervene. On XXX, at approximately 1:30 PM, in the Stanford Oval parking area in [XXX], I was using Tesla Full Self-Driving (Supervised) in my brand-new 2026 Tesla Model Y when the vehicle began a reversing maneuver between two parked vehicles. During the maneuver, the on-screen visualization continued to show space between my vehicle and the surrounding vehicles. The vehicle then made physical contact with another vehicle. I received no proximity or collision alert, and the display continued to show clearance after contact occurred. After contact, the vehicle continued attempting to reverse, stalled, and behaved erratically. I attempted to brake and disengage the system, but the vehicle kept glitching and moving backward. I could feel resistance while trying to control the vehicle.Shortly afterward, at [XXX], the vehicle showed substantially similar behavior and again made contact with another vehicle. My vehicle sustained damage to the rear bumper and lights. The other vehicle had pre-existing damage, and its driver told me she did not want to pursue anything or have her vehicle repaired. The vehicle is brand new and I had no prior accidents. I will be assessing myself for injuries. I reported the incident to Tesla. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)