Odd boot opening issue

[Frimley111R]

I have a MY12 car and on a number of occasions something around the offside boot hinge catches on the panel behind the roof and as I open the boot it makes a loud 'crack' as if something is catching it. Its actually split the panel now (first warranty claim, here I come...). Has anyone else had this rather odd issue?

[Frimley111R]

Update: took it into the dealer who diagnosed a failed bodywork clip. As the engine gets hotter the panel and fixings expand slightly, just enough to make the front edge of the boot catch the panel. It's a known issue apparently (although quite rare) and so they are sorting now with a new fixing and panel (as the panel has split as a result).