2023 KIA RIO Electrical System Problems

When I started my car, during the warm-up process, it dropped revs and turned off. After several tries, it turned on. While driving, when the vehicle was stopped, it began to jerk slightly. The safety risk is that the car, while I am driving, could turn off and cause an accident, in which people could be at risk, including me. I wouldn't want this to escalate because the dealer doesn't take action on the matter. The vehicle was taken to the dealer to evaluate the condition, they say that the technicians did not find anything, that the car did not emit any codes. And therefore they couldn't do anything. Note that I bought that car completely new, 0 miles, in March of last year. And in January the problem started. It is also worth noting that the car had to have a rack&pinion change in less than a year, due...