Cube peloton vibration

[Davidcj1971]

I have this problem every time now I go out. Vibration noise from rear derailleur / chain. This happens intermittently. I can go 5/6 miles with no noise, then 1/2 with it happening every time. Bike just under 12 months old. Looked everywhere for loose jockey wheels, loose rear derailleur, chain damaged but to no results, any ideas to solve this greatly appreciated thankyou

 

[BigTam]

Check everything it correctly tightened, not forgetting rear cassette and skewer.

 

[lpretro1]

Check b screw adjustment

 

[Davidcj1971]

Update on problem, it seems the chain when it engages bottom jockey wheel is not quite centre on it, this then seems to throw the chain off the wheel. Bent derailleur? Hanger bracket ? Not sure what to do now, bike to shop for service, 12 months old this November. Anybody else come across this issue ?