Sunshade failure and repair question

Anyone figure out what part fails on these? Doing research it seems that this happens often, and the third one in four years just failed on me. This is the issue where the shade loses tension and droops down into the interior, and if you attempt to open your sunroof the shade bunches up in the car of the car.

The research I've done shows that most people have taken it to a shop or dealer and had the part replaced under warranty. With more people being out of warranty and the part being $170 + multiple hours of labor to replace, I'm looking to figure out what the fail point is to see if perhaps there's a way to stop this from happening again. Anyone else dealt with this?