I don't have this condition on my 150 Ell Nikkor. However my 80 Rodagon does have provision to disable the click stops and I mention it since you may have the same situation with your lens. On the Rodagon, there is a slide actuator on the barrel that can be slid to activate/deactivate the click stops. Beyond that, I don't know what might be going on with your lens. I don't know that I would like to work with a lens that could not be set and maintained at a given stop.

My 240 Schneider has click stops.