No flats though, which is good!
About half the guys in my club using them in road bikes with supple tires get flats lickety split, so I think your tires might be protecting the lightweight tubes to some extent.

I have some cheap TPU tubes I got from Amazon with mixed reviews and I hesitate to put them in my Domane with the Harcase Lite tires that haven't had a single flat in 4400 miles of road riding. (and a big chunk of that in the city)