So I just went out for an hours blast in my lunch time as I'm working from home ;-) From about half way round my normal 10 mile loop I felt something that I thought was from the front mech catching etc but after a while caught site of the bottom of the rear derailleur sort of catching and jumping/moving forward/snagging when pedalling under pressure.
Pretty sure I didn't hit anything to bend or move anything.
Only thing is that it's been raining most of the morning so wasnt too muddy but pretty wet and when I went out Tuesday night it had been dry for a week or so and put muc off dry lube on after my ride. When I rinsed the bike off when I got home today the chain and cassette were spotless - do you think the lube just came off to quick in the wet or is it something more do you think? The jockey wheels are not worn - they're only about 6 weeks old -always something!