Why is my left joystick rotating?

I was playing Jedi Survivor when all of a sudden something clicked on the controller. I have some light stick drift, which isn't an issue personally as I usually play singleplayer..

But the joystick is now rotatable? Usually when you use the joystick, it stays in the center and the stick itself doesn't rotate. Welp, this one does.
I'm not sure if this is replaceable or not, please assist!