I'm 6' 3" and prefer to fold the rear seats down and climb through there with the trunk lid already closed. I had the same thing that I observed a few days after delivery. I had the ranger adjust the trunk lid to stop the unwarted contact. Then the ranger sent word that I had to get my trunk lid and bumper repainted for which I waited 3 months.Mine does this and I gaave up on it, you can adjust the stoppers on the truck lid that rest of the taillights to hold it up higher but then the trunk didnt sit low enough.
if you climb in the trunk and close it you can see how badly the trunk lid contours to opening, i see daylight thru mine even tho everything looks fine on the outside