2019 Hyundai Tucson fuel system problems

I was driving on the highway. The engine began making a ticking noise that momentarily went away and then quickly got louder. I saw white smoke out of the back, pulled over, and then saw black smoke from the front. The check engine light only momentarily came out AFTER the white smoke was visible and I was actively pulling over. I ran out of the car, and turned to look only to see a fire under the engine bay. I did not have a collision nor hit anything on the road.

When you step on the accelerator, sometimes the vehicle stops and takes a couple of seconds to continue running. I've faced a couple of instances were at a crossroad vehicles are coming towards me, and the car stalls and takes a while to start moving. I've been told by the mechanic car dealer that this is normal in this new accelerating system. It's can of scary and you need to accelerate and get stuck in the middle of the road. Mine is a hyundai 2019 tucson.