Same thing just happened to mine today.

 

Mine all collapsed in one day. then i brought it to the dealer, they fixed it (7 hours later) and i take it off the lot the things fall right off. I roll back in.... the tech's forgot to snap it all the way in place. if one edge is hanging a little lower not flush against the liner try snapping it in by pushing on it from above and below... the liner is really easy to get above, just pull the sealant trim away near the sunroof and your hand gets in there easy.. its just a pressure trim so nothing sticky or need to reglue.

 

Thanks. I'm going to try that when I get home from work. I don't want to have to leave my car at the dealer all day for this stupid switch unless it's absolutely necessary.