Rear index shifting causes me to adjust front shifter
So I'm a pretty big noob to shifting and gears since most of my bikes have been SS but now I am having a shifting issue. The bike is only a couple months old so I'm sure it's probably due for a little tweaking...
Anyway, the rear is indexed shifting, and I find when Im switching to a couple, but not all of the sprockets, that I have to slightly adjust my shifter up front to keep it quiet. It's just a minor inconvenience but didn't always do this.
I can't figure out if this is a front or rear derailleur issue or both. Is this a common issue for indexed shifting?
would appreciate any input!