My Diverge has had done around 180 miles and had one cartridge replaced after 70 miles due to knocking. I’ve just come back from Italy and it’s knocking again so I’ll be taking it back to the shop. The knocking is apparent if I drop the front wheel from a few inches onto a hard surface. This disappeared as soon as it was replaced the first time. I’ll be asking the shop to contact specialized and if it can’t be fixed I’ll be demanding my money back.