This is the same style that Menard's uses on their cars. There is a root cause of many coupler false openings, it's the internal lever that is part of the magnetic actuator. The coupler is fixed to the truck body, but the releasing mechanism is held in place by a sloppy fit around the axles, and it moves around some during operation. If the lever is bent too close to the actuating arm of the coupler, the movement can open the couplers.
Here's a link to my Menard's Coupler Fix, I suspect these have exactly the same problem.
