-A few weeks prior to accident, while driving down a 65mph highway in TX, vehicle side mirrors were folding inward. Continued to fold inward after hit button to open them multiple times. Even did this after pulled off highway and stopped/started vehicle and exiting vehicle and locking to try to create a "reset" of system. (Auto folding windows feature in infotainment was NOT selected to be ON before or after this incident! Auto-folding sidemirrors are tied to the electron shifter status and should only engage when turned ON in infotainment option AND vehicle in PARK. This was occurring over 2-3 days while driving on highway at 65mph) Accident: -Pulled into parking spot and placed vehicle in PARK. -Front Dash Camera audio indicates the "Ding" confirmation of park and hear vehicle doors unlock upon Park status. -Vehicle was still ON and began to slow roll UP HILL BACKWARDS in parking lot and strike another parked vehicle across the double wide aisle. -No rear camera was engaged. -No collision alert (no seat vibration which was always ON in infotaiment option) -No automatic braking for about to strike a vehicle. -Display after impact was on the Buick Startup Icon, NOT the infotainment icons. -Vehicle driven immediately to Buick dealership and Claim initiated wth ESIS (regarding product liability claim with GM (General Motors) -no police due to private lot - 9 days later the black box data (Bosch Crash Data Report) and vehicle Global Diagnostics Sysem Reports were downloaded f