I have this problem too.
By the hatch trim panel do you mean the paneling on the hatch itself? Or is it the panel area where the rear washer spray is located?
Also a weird aside, my X does the door chime noise anytime I open my driver door, key in ignition or not, but the other doors do not set it off.
Also, I have removed the wiring for the rear dome light and I noticed the 3rd brake light is not working, are they connected?
Thanks for the info in advance, I love this site and will be an elite explorer someday!
Joseph.