Chosen Solution
I purchased 3 of these controllers and all 3 have trouble with a jittery right analog stick
If you are using a tool like this https://gamepad-tester.com/ and notice that one of the joysticks/analog sticks are moving erratically, here is what I did to solve the problem: Take the controller apart (completely remove the board from both shells)Remove the plastic part of the analog stick (it slides right off by pulling it up)Pour/squirt isopropyl alcohol into the analog assembly, and wiggle the metal stick around to work it around the inside.Let dry for a moment, plug the board in, and test. If the erratic behavior is resolved, go ahead and reassemble the controller, if not, unplug the controller, repeat step 3, and try again.