Engine Belts And Pulleys problems of the 2018 Hyundai Sonata

While driving 30mph approaching a red light, my 2018 Sonata cut off once I came to a complete stop at the red light. I was in city limits approaching a hwy intersection. The check engine light came on and the car restarted after one attempt. Once the vehicle re started it was sluggish,sputtering and would not accelerate over 20mph. . . I made it home safely nonetheless. I left the car parked for approx 10 mins and it restarted easily. I then drove it directly to the local dealer where the car was purchased. I was told the car stopped because the engine system required an update. The update was completed and I drove the car home. The next day or maybe two days later I received a letter from the dealership saying my car required a free recall and to schedule a date to have the car serviced. Over the phone I was told something along the lines of the engine harness needed to be replaced. When the car's engine cut off in traffic I was en route to picking up my toddler. I no longer felt safe driving the vehicle and I traded the car in and cut my losses, which were substantial. Other problems I noticed in the time I had the vehicle were that the back passenger seat belt locked or anchored if I leaned forward slightly and low visibility at night through the front winshield.