Found this response on Ford Truck Forum
https://www.ford-trucks.com/forums/939615-3rd-row-powerfold-seat-stuck-down.html
This resolved my issue - posted by trpltongue:
Basically, the motor isn't attached super firmly and when moving the seat up and down it can get "wedged" in such a way that the motor cannot move down the track.
I was able to use my hand to wiggle motor and to get it working again.
https://www.ford-trucks.com/forums/939615-3rd-row-powerfold-seat-stuck-down.html
This resolved my issue - posted by trpltongue:
Basically, the motor isn't attached super firmly and when moving the seat up and down it can get "wedged" in such a way that the motor cannot move down the track.
I was able to use my hand to wiggle motor and to get it working again.