Starter problems of the 2017 Jeep Grand Cherokee

My car has stop/start system so when I put my brakes on to stop the vehicle it cuts off the engine and when I take my foot off the brake it automatically restarts the engine. Very recently when I had stopped at a traffic red light, and a traffic jam, engine shut down with braking and did not restart. I could not restart the car either, and the gear was locked on park. Could not put the car on neutral gear to move it out of main road. There were about 10 cars behind me. Very scary and dangerous situation. It finally restarted after several trials, may be 10 or 12 trials while I was waiting tor the tow truck to arrive. I was also worried that the car could not be towed without putting it in to neutral gear. This happened on four different times. I took it to a dealer service center three different times for this same problem. They first changed auxiliary battery and told me to drive the car. The very next day car started stopping again. They then changed the 2nd (main) battery. Problem remained. Then finally they found that one of the battery wires was not securely connected to the starter via a connector. They have put a new connector. It is a scary situation, and can lead to loss of life on road. If it knocks off the engine behind a traffic jam and does not start back it may lead to serious accident and even death. It is only 6 month old brand new car and I did not expect this problem. It can not be easily put in neutral gear if engine can not be started which is a major traffic hazard. This needs to be thoroughly investigated and recalled. They have provided an option to override park gear in to neutral but it is not very easy for a person to locate and find the override option. I think this problem is a major traffic safety hazard. I request you to kindly investigate this problem with Jeep Grand Cherokee. Thank you very much.