Been finding quite a few of these on the jeans lately. Means they're finally getting some wear and tear. Had a chat with Alexander from Dr.Denim and he has a wear on his jeans, that are probably on Day 100 at the moment, in the same place as mine. Impossible that it is a defect in the material, but the wear looks similar. Will take a photo when I see him again.
This tear in the photo is from folding up the hem. I start with one fold, and currently I am on three folds, as these jeans stretch.