I bought a new 2015 Ford Expedition Limited 4x4, also my first Ford in 49 years of driving. I have also had numerous problems, but no duct tape......
Perhaps the Ford pre-delivery instructions (PDI) for preparing the new vehicle for delivery to the customer includes instructions to remove various tape under the vehicle - but the service department did not perform the PDI properly? I’m speculating, but I can’t image Ford would build a new vehicle with tape that quickly begins to fall off due to the weather.
I'd bet that is what happened. The dealership missed take ot off.