Weak spot in Assos Mille GT C2 bib shorts

I have three pairs of Mille GT C2 bib shorts (about 2.5 years old) I cycle through for my outdoor rides.

I just noticed there is a hole in one of them, just where the stitching at the chamois ends, and lo and behold, the other shorts are developing the same kind of hole in the same spot, on both sides of the chamois. Seems to be a weak spot in the design, maybe from moving my butt back and forth in the saddle.

I am aware as long as it was a current model (seems to have been discontinued) it was the cheapest summer bib shorts in the line-up, but I consider the 145 euros I paid back then still a premium price. All bib shorts are washed at 30 degrees in the gentle cycle in laundry nets (bags) with liquid detergent and dried on the rack.

I am gathering after more than two years Assos is not going to want to do much about it. And yes, I got some mileage out of them, but again, at this price, I was expecting them to last longer. They still hold up great in all other respects.

Has anybody else found this kind of damage with their model? Any luck and experiences getting it mended and reinforced at these spots?