My chain is bunching/slipping under acceleration - not skipping gears but losing traction on the cassette. It feels like it's jumping through the mech all at once. The leading pedal drops about an inch, two or three times per stroke, when I try to accelerate.
SRAM Red mechs and chainrings and SRAM cassette are all the same age and not obviously sharky/worn out. Chain is new (and I've tried taking out a few links, which hasn't helped).
What's my next step to try and resolve this? And is there an order in which I should replace parts in order to solve the problem before replacing the whole drivetrain?