Rear tailgate windscreen not fitted properly 2016

Gen 4. I noticed little brown dots appearing in the black glass around the drivers side (right) on the tailgate. Curious I watched them grow, "Can not be right" I thought. Along the top edge then down the bottom right corner, time to ask the dealer.
Anyway it was not a priority, but after a good wash and brush up, while polishing around the glass edge near the top right I noticed that the glass moved. Not much but enough to see, and it rattled if moved fast. Ah could that be the noise coming from the back end? Shure was! Dealer time.
Dealer looked, scratched his head, looked at another in for service. Yes dots in the right hand corner. Nothing on the new ones. "Bring it back for the once over". Back next week and Toyota had taken an interest. New screen.
Back the next week and a new screen fitted, phone call late in the day. "Sorry new screen has a chip in it, will call tomorrow when another has been fitted".
The next day new screen fitted all good. Dealer showed photos of the old screen and there was little sealant around the right hand side from the top one third right down to the bottom. He said there had been problems with another new model that they have replaced several front screens.
So if you get little brown dots appearing about 2mm diameter spaced 100mm apart you now know what to do. Apparently they are designed to show that the sealant has been applied and cured properly, mine hadn't!
Unfortunately I cannot find what happened to the photos.

 

Could be. My sealant went from a thick beak to almost nothing, easy place for water to get in. They have a clip fixed to the glass underneath out of sight, zip tied to the metal to stop the glass from fully detaching. Very strange!

 

Porous carbon fibre