Yes a typical fault for these, also seen on lenses with similar design for instance 20-35mm AF-D f/2.8 and 105 and 135mm f/2
The later lenses did not have this issue, a silent revision of the ring was most likely introduced with a better material or fiber reinforcement, they seem to have a different shine to them. This is unconfirmed, but I never had a lens with this issue,,,