Car Stall problems of the 2017 Audi Q7

Tl- the contact owns a 2017 Audi Q7. The contact stated that when the vehicle's is stopped at a red light or stop sign the vehicle stalls and shut off. The contact would have to push the vehicle's start button for the vehicle to return to proper functionality, however, when the contact comes to a stop the failure reoccurs. The contact stated the failure had become more consistent. The contact had not taken the vehicle to a certified mechanic or dealer. The vehicle had not been diagnosed or repaired. The approximate failure mileage was 30,000. Gl.