Brake Master Cylinder problems of the 2020 Hyundai Sonata

On Nov. 17 while driving app. 65 mph on the highway the car suddenly shut itself off. All of the dashboard lights lit up & the car would not restart. After 10 min. Of trying to restart the car, the car started again, & all the lights on the car disappeared. The following day, while waiting in the turning lane at a red light, the car sputtered & turned off. All the lights on the dashboard lit up & the car wouldn't start I had the car towed on Nov 18 202 to a Hyundai dealership. The dealership reported that there was an internal short with the abs module & the hydraulic module assembly was replaced. On, Nov 24, I was driving the car & the car stalled all the warning lights went back on. I had the car towed the dealership where it stayed until December 11 the dealership stated that they could not find anything wrong with the car. I picked up the car on Dec 11 & the car appeared to be working normally. However, on dec19, while stopped at a red light, the car began to shake back & forth at idle & the rpms started to go up despite my foot being on the brakes. The car behind me saw what was happening & helped me pull over to the side of the road. I had the car towed to the dealership yet again. The dealership stated that they were able to duplicate the issue on Dec 23, 2020. However, no fix was done to the car. The dealership claimed that the car was in a �relearn� process & it would need more time for the car to �relearn� how to drive again. Everything seemed okay after the Dec 23 incident until Feb 8 2021 when I tried to stop while in traffic & the brakes would not work at all. I narrowly avoided getting into a major accident & once again brought the car to the dealership. The dealership found that the master cylinder assembly was internally defective & was not holding pressure and as a result the brakes were not working. The vehicle was returned to me on Feb 11 2021.