2019 Hyundai Veloster

My rpm’s were running very low after putting gas to the point the car felt like it would turn off when at idle. I was stopped on a highway at a light when the car revved low and shut off completely. The light was green and I had to sit and try to get it back on, it started right up. Brought it to the dealer and they found no issue with the car. Rpm’s have still been low to the point the car seems like it wants to stall & I’m not sure what to do. It doesn’t make me feel safe driving it.

ON MAY 7TH MY CAR WAS COMPLETELY DEAD WHEN I TRIED TO TURN IT ON ON THE PARK LOT OF MY WORK. WOULDN'T TURN ON, NO LIGHTS, DOORS WOULDN'T OPEN OR CLOSE. CAR WAS JUMPED BY THE TOW DRIVER AND WHEN GO TO THE DEALERSHIP THEY COULDN'T NOT IDENTIFY THE PROBLEM NOR COULD HYUNDAI. THE TOW DRIVER TOLD THEM THE CAR WAS COMPLETE DEAD AND STILL THEY GAVE ME BACK THE CAR SAYING NOTHING WAS WRONG WITH IT. BUT A ABOUT A MONTH AGO THE CAR STALLED AND WENT COMPLETELY OFF WHEN I WAS DRIVING ON A HIGHWAY 95 IN MIAMI, FL. AT FIRST I THOUGHT IT COULD HAVE BEEN A HUMAN WHILE SIFTING GEARS BUT NOW I KNOW IT WASN'T. BUT AFTER EXPERIENCING IT A SECOND TIME I KNOW FOR SURE IT WASN'T HUMAN ERROR. SOMETHING IS VERY WRONG WITH THIS CAR AND HYUNDAI HAVE NOT BEEN GABLE TO FIND OUT WHAT. AT THE EVENT AT THE HIGHWAY I WAS ONLY ABLE TO BRING THE CAR BACK RUNNING BY SNAPPING THE CLUTCH AND THE GAS. IF IT WAS AN AUTOMATIC CAR FOR SURE THAT WOULD HAVE CAUSED A BIG ACCIDENT. AFTER THE LAST TIME THE CAR DIED IT TOOK HALF A TANK OF GAS TO DRIVE LESS THAN 30 MILES. HYUNDAI, IS SENDING THE CAR HOME TO ME EVEN THOUGH THEY HAVEN'T FOUND ANYTHING WRONG WITH YET. THEY ARE PUTTING A "BLACK BOX" FOR ME TO RECORD THE CAR ENGINE ACTIVITIES AS IT HAPPENS. I FEEL SCARED AND UNSAFE DRIVING THIS CAR. IT IS SUCH A SERIOUS MATTER THAT I WANT TO SHARE IN CASE SOMEONE ELSE EXPERIENCES THAT SAME THING AND I WAN TO MAKE SURE MY STRUGGLE WITH THIS CAR IS WELL KNOWN AND HOPEFULLY WILL INSPIRE SOME MORE INVESTIGATION.