Yes and it’s not a new thing or limited to Fiat, was the same wehn I worked for Peugeot, Citroen, Seat, Vauxhall or vehicles I’ve worked on for friends, mates or wehn I worked for myself through Uni, (as a mature student) Suzuki, Skoda, Mitsubishi, Ford…
I have no reason to substantiate this as fact but, as the very unequal wear is always on the rears and always on the inners, could this be the silly back plates that always rust off? Wehn any of mine or friends have i just remove them and don’t replace.