squeaky sound from driver's door

[Solidgold]

Only recently, I am getting this squeaky sound coming from the driver's side door panel. At first, I thought it was the arm rest on the side of the door getting loose. But seems like the black plastic inserts on the armrest of the door is the problem. This is the part which you hold on to when u are closing the driver's side door whilst sitting inside the car. Not sure if it is design flaw but notice that there are gaps around the black insert. When the car moves, it squeaks.

Anyone encountered that? Any fixes?