Have had a SRAM NX Eagle rear derailleur (bike is a 1x) on my YT Jeffsy for about a year and a half. For about the first year, worked awesome, indexed the gears a few times and all was good. Last half a year its been a disaster.
I can't seem to get it shifting properly in either direction. I replaced the shifter cable AND housing (i know some people will just replace then shifter cable) and still having issues. What i've diagnosed is that it will shift up (or into high gears) and then the derailleur will get "stuck" when trying to shift back down to low gears. I can see the cable going slack and removing tension (i'll shift down ~3 gears) but the rear derailleur won't move from the highest gear. If i lightly move the rear derailleur back and forth it will overcome whatever is causing it to stick and then shift down into the intended 3 gears down all at once. Usually if i get up to 5 gears or so it will start shifting down without me touching it. Any ideas?