Engine Shut Off Without Warning problems of the 2019 Ford Expedition

Followed semi into dealer service parking lot. Semi turned left so moved forward to join line of cars into service bay. While coming to stop, semi on left backed up and coming right for me. At my stopping, auto engine shut off turned off engine as was trying to shift to reverse. By time engine turned back on, acknowledged reverse, engaged reverse, responded to accelerator being pushed, gear engaged, the truck was about to hit me as driver did not see me. Luckily driver noticed and slammed on brakes. By this time, vehicle was still trying to move so if truck did not stop, I would have been hit. Auto stop of engine is a dangerous feature. While may work at a traffic light, in a situation requiring quick response, too many steps to turn vehicle on and engage a change of direction. Ford has a feature to turn off manually, but should be allowed to turn off all the time. If vehicle shuts down in emergency situation as this, a person could be killed. This event was viewed by several people and all I could say was could not move as vehicle did not respond quickly enough. Emissions are not more important to people's lives and this feature needs to be removed or allowed to be overridden.