Ok, kind of an on and off problem i have been having since i built my newest bike up a couple of months ago.
Have been through the process of preloading top-cap, then tightening stem, then finishing off top-cap. When holding bike off the ground steering is nice and smooth, wheel drops to the side nicely. However had some feeling the headset still had some play, however put this down to play in disc rotor instead as it didn't exist when both brakes were held or wheel was sideways.
So based on that, steering should be all fine, however there are times when it gets a bit twitchy and stiff, feels like it gets a little stuck when say moving back from 20-30 degrees off centre back towards centre. Symptomatic of a too tight headset, but the headset isn't too tight?
This was all fine for a while recently, however reappeared yesterday in the pissing rain, and has persisted today.
Do i need to grease the steerer post more? Could it be the crown race (i don't know, 99% sure it was properly seated when building)
Bike is a steel gravel/road frame and forks, with 33mm tires, disc brake wheels (mechanical).