2025 BUICK ENVISION Power Train Problems

On 12/18/2025 at approximately 5:00 pm, during rush hour traffic, while driving 60 mph on the expressway, my car automatically downshifted to drive1, the engine revved up significantly and the car reduced power and had sluggish acceleration. It did not come out of Drive 1 until I was able to get off the expressway and put the car in park. The car is available for inspection upon request. I was panicking in heavy traffic and cars were honking at me as I could not speed up. I took my car to the dealer but he could not reproduce the exact problem. The vehicle or component has not been inspected by the manufacturer, police, insurance or representatives. There were not any warnings or messages prior to the symptoms. This is the second time this has happened within the eight months that I have leased the car.