We dont have a start button. Normal shifter and key. 2018. We called for service probably going to get a new battery tomorrow. Under warranty should covernit. It stalled out while msg was on dash. It wouldnt restart at all. Wouldnt even fire.Can't you put the car in Park and restart it? Press the start button to turn on ignition to put it into Park.
When you get it going put the shifter in Sport mode to get home or wherever to prevent it happening again until you get it checked out at the dealer.