Transmission Not Go Into Gear problems of the 2007 Ford Expedition

When you drive the vehicle and come to a stop, (intersection) the vehicle will go into neutral while it's in drive and upon pressing the accelerator pedal, it enters a safety type mode with no indication and will remain in gear zero for approximately 1-2 seconds and then as it starts moving, it does so with very little power leaving the vehicle in danger of getting struck by another vehicle from cross traffic. At this time, I have no idea what is causing this issue but it seems to be common via the internet complaints on the 6r80 transmissions on Ford vehicles. This has happened to me 4 times while trying to cross multi lane highways but the most recently came very close to what could have ended into a multiple fatal accident with a semi truck who was barely able to stop in time before I was able to cross a 3 lane highway. I have been able to have the vehicle go back to normal by simply shutting off the vehicle and restarting it. What makes this really dangerous, is the driver such as me being unaware that my vehicle is in a safety restricted power output when this happens. No warning until you commit into a deadly situation. People report this issue on the internet as the vehicle going into neutral by itself when coming to a stop. When they try to resume driving the vehicle rpms will increase and the vehicle might or might not pop into gear softly or forcefully. Sometimes with full acceleration authority and sometimes with a max attainable speed of 5 mph or less depending on the gradient and terrain until you can reach a safe spot and restart the vehicle.

We have a 2007 Ford Expedition with a remote electric start installed in the truck. When you remote start the vehicle then get into the vehicle with the keys out of the ignition you are able to put your foot on the brake pedal and move the gear shift to any position. . . . . . . . . . . This has been witnessed by the Ford dealer who was shocked, but has told me its working the way it was designed. . . . . . . . . . . If you test this,,,,,,, remote start the vehicle then sit in the drivers seat, put your foot on the pedal and move the shifter. The car will shut off as its suppose to and once the engine dies the shifter will not move. Its just for the split of 3 to 10 seconds it takes for the engine to stop that shifter is free to move . . . . . . . . . . If a child is to enter the vehicle and put their foot on the pedal they will have that amount of time to move the shifter and once you move the shifter that car is free to roll at anytime and the shifter can still move . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The problem as I see it. If I remote start the vehicle and a child climbs into the vehicle and pretends to drive puts his foot on the brake and moves the shifter, the car is going to roll and it never had the keys in the ignition. . . . . . . . . . . . . . . . . . . . . I park on a hill and this good easily kill someone if the vehicle rolls. . . . . . . . . . . . . . . . . . . The fix would be not allow the gear shift to move out of park with out the keys in the ignition. I was advised by Ford not to remote start my vehicle with the doors unlocked and thats fine for me, but for the rest of the drivers of these trucks who knows. I have been told this must have been missed by Ford. The ignition needs to see the key before it releases the shifter. Just my thoughts. Thank you.