Optima 2020, 200,000 mileage

The car is clean with automatic transmission and all movements are functional. It needs minor scattered dents and some dents have putty. I bought the car for 46k eight months ago. There is an issue: sometimes when going over bumps, it shuts off and immediately turns back on. I don't know what's wrong. Location: Asir / Tharth Contact number (phone and WhatsApp): 0535471238.