Most irritating. I had this on my 1999 Gen 2 Shorty. Tried all sorts of cures (even lubricant on the rubber), then decided to unscrew the door catch, & turn it around. Voila! Problem gone. The little door catch wears on one side. By turning it around there is fresh "meat" to grab onto. I don't know about Gen 3 / 4, but I would imagine it's the same. Take a look, anyway.
Pajero Pete