Loud Engine Noise problems of the 2020 Ford F-150

My vehicle would not exit out of a drive or moving until I stopped the vehicle and disconnected the neg battery cable. The vehicle stayed in a state of high rpms. There were no warning signs and no warnings displayed on the truck display. This is the second "speeding out of control" situation in two days. I fear for the safety of myself, my family, and everyone around me. I don't know what triggers the onset of this condition. I exited from state highway 5 onto exit 104 (hwy 101) and took a left on mud bay road. I was traveling 30-35 mph when I began to slow down to almost a complete stop to make the right turn into the swimming facility. My truck would not slow down. I pushed he brakes very hard to prevent the truck from speeding uncontrollably. I pulled in to a parking spot as best as I could. The truck rpms were maxed. I own an automatic drive. With my foot on the brake, I shifted from d to n. There was a loud sound of gears during the shift. The truck rpms were still maxed out. I turned off the truck and placed the truck in p. I also enabled the parking brake. I started the truck and the truck rpms were still maxed out. I kept the truck running for an additional 30 seconds. My wife and bystanders indicated that there was a burning smell emanating from the truck. I turned off the truck and the truck displayed an "overheating" warning. I allowed the truck to cool down and disconnected the neg battery cable for 15 min. After I reconnected the neg cable, the truck reset to normal running conditions. I have owned the truck for three months and the truck is still under factory warranty. The dealership that I bought it from does not acknowledge that 2020 F-150s have had problems with the transmission/engine. I will take my truck there tomorrow (13may2021) for them to view the error codes.