I have worked on I don't know how many of those, and their J.C. Higgins cousins, and I have never ever even heard of that problem before in my life.
I used to shoot with a guy, and he was mainly into trap. Had a High Standard pump with a stuck on cheekpiece. He shot that thing every week for years and never had a single issue. I suspest maybe the heat treating on your trigger was sub par or someone buggered it up trying to adjust the pull. I would get a new trigger and never have a concern.