Just a thought
I haven't had that problem, but when I was an auto mechanic, we had a technique for dealing with something with hinges that didn't work properly.
You might try slightly loosening the fasteners that hold the screen door hinges to the trailer. Then open the door and see if something moves. Both hinge pins should be vertical and the edges lined up parallel to the frame.
Hope this works,
Wright and Penny
2010 Tundra 4X4 5.7L V8
2014 Rockwood 2604WS
Life is a cruel teacher. She gives the test first; the lesson then follows.