I had an annoying noise in the cabin before, turned out it was my girlfriend.
Maybe your door needs re-hung, sometimes with leaning on the door, or when passengers getting in and out, lean on the door i suspect it drops a bit.
If you look at the line from outside the car, just to see if everything lines up ok...
I seen a guy adjust the catch that the door clicks into adjust that, and it fixed a simliar problem....
Worth a try !