Black plastic trim around rear moonroof

[Tom Champagne]

My wife's 07 Edge is in the shop for the 3rd time because the black plastic trim ring around the moonroof in the back(rear seat area)keeps coming loose. The dealer has tried the TSB that was issued last year,but it still comes loose. It's really annoying when the shade is fully closed,I assume there is nothing to press against the trim ring when the shade is closed,when open,not a peep. He tells me the sun must be heating the glue or what ever adhesive they're using to attch the panel. This is getting very annoying. Anyone else have this problem(that continues after repeated trips to the dealer)? Anyone have a fix-it and FORGET IT solution? Any help here is greatly appreciated.