I think I've had to either adjust or replace every single one of those drawer catches form the factory. The day the built mine, they were good about using one screw in a place where two would do....
Another possibility, touched on by Dilley's post... I recently had a drawer slide fail.... the ball bearings just fell out of it and it was sticking and jambing up.
I've had to replace others in the MH over the years too, but those were because of misalignment and too few screws doing the job.
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