Brake Hoses, Lines/piping, And Fittings problems of the 2017 Ford F-350

My 2017 Ford f350 has now experienced three events referred to as "death wobble" or shimmy which causes severe shaking of the entire truck and especially the steering wheel. First event in bakersfield calif where I hit consecutive bumps in the freeway while traveling 65 mph. Had to slow to less than 40 mph to get it to stop. Second event was towing my 5th wheel down a 6% grade into verde valley arizona. Heavy braking caused the same death wobble in addition to the truck pulling to the right. Speed was 65 mph. Third event was leaving mccarren airport in las vegas nevada where hitting a freeway bridge transition caused the death wobble again. Truck has been to local Ford dealership. Alignment checked ok, tracking bar torque ok, wheels ok, ball joints ok. Brake hose did not pass pressure test and was replaced under warranty. Dealership cannot find cause. I sincerely believe this is a design issue or oem parts installed at factory were defective at time of installation. This is my fourth superduty 4x4 supercrew. My other three never had this issue. In investigating this issue I found two automotive related websites where 35 plus late model superduty owners complained about this same problem.