I’m having the same problem, on a *brand new* controller I ordered from Microsoft’s design workshop, meaning I paid extra for a brand new faulty controller. The last controller I took apart myself and rebuilt was from a PS2 about 15 years ago. I know nothing about the inner workings of modern controllers. My question to those who have repaired their own: is this something that can be fixed with basic tools just by following instructions? Or should I be contacting Microsoft to complain about it?