Odd clicking from gears noticed today after adjusting the mech, after closer examination, I can see on some links it takes a bit further before the roller drops into the jockey wheel.
The chain was removed and put back on (was very grim so removed for cleaning) ~2 weeks ago, both the chain and mech were replaced at the same time (Oct 2019) so have done the same number of km, which considering the lockdown and it was winter can’t be more than 1500km.
When it doesn’t mesh I can see the jockey peak contacting the inner plate of the chain. Only happens on a select link so I don’t think it’s the jockey but equally I can’t see anything wrong with the chain.
In all my time breaking my bikes I’ve never seen it behave like this.