NHTSA Complaint #11426537 — 2015 FORD F-150

I was driving on a city street at about 30mph up a slight incline when the truck just seem to shut off. But it didn't die, the engine was still running but barely. It was running very rough, like miss firing on several cylinders. It would not accelerate, no change of engine sound or power, the throttle was totally unresponsive. It also felt as if the brakes were being applied slightly. A message came on the dash saying something about hill assist and another wrench message. I had no chose but to pull over in traffic before it quit. This was on or about July 18 then again today on July 26. This time I was one a city street down to one lane due to construction. I was barely able to make it to a turn off before it totally quit moving, with traffic backed up behind me. I shut off the engine to let the computer reboot and got a message that hill assist was now off. After a longer than normal crank time it started and ran ok. I called Stivers Ford to make an appointment and was told it was probably a fluke, and wait and see if it did it again. I now have an appointment for August 4 to have it checked. I went on Google after the first time and found many complaints about the same situations, but with no fixes. If this were to happen under the right circumstances it could be very serious. I'm a recently retired auto technician , and shop owner of 48 years. I understand the difficulty in finding intermittent failures. But after reading all the same symtoms in Ford pickups for years it seems there should be more done from the manufacturer to address this problem.