While driving my 2019 Jeep Cherokee, the vehicle's start/stop system malfunctioned and caused the engine to completely shut off at a traffic light. I had my hazard lights on, and while stopped safely another driver rear ended my vehicle. The Jeep has had repeated issues with stalling and engine shut-off since I purchased it. This is a serious safety concern and could have caused greater injury. I brought my vehicle to the dealership 3 times for the same issues once back in 01/25/2023, when the vehicle was still under warranty a part was ordered and replaced, but the same issues kept recurring. When I brought the vehicle back in in 2024 I was told because my warranty had expired I would have to pay out of pocket to repair the issue.