The rod that connects the external door handle to the latch on the front passenger door on my '03 406 regularly pops out of place, leaving the door handle inoperative. It requires removal of the door trim and hardware followed by some blind groping to reattach the rod. It seems to click firmly back into the white clip but a few days/weeks later it's out again.

Although I'm now quite efficient at at the job I would rather not have to do it so often. Does anyone know what might be causing the rod to dislodge and how to fix it?