Same things is happening to me, I bought a new TV and my Gamecube controller (an original one) started tilted to the right often when I pull left… it looks alright and centered on the controller but for example on Smash Ultimate menu or character selection, it often goes back to right when I want to go left… I managed to play online for an hour and then it happened again… I don’t think the TV or even the GC adapter is faulty cause my other Gamecube controllers are working fine for the moment. So it’s a spring problem ? Weird that if happened so suddenly, I mean two days ago it was fine… but I think I’m gonna try to open the controller to see.