I have the same issue. Just started season 4 with all durability apart from gearbox major and ultimate. I use component set 1 in practice and set 2 in race. Set 2 has 2 races worth of wear apart from CE which I forgot to swap around, all the set 2 components are 0% wear. Set 1 which is for practice has wear from 0-4% and I do optimal every program so as low running as possible. Please sort this out