Why is the InputSystem detecting movement on my PS4 controller, even where there is no input?

Hello!

I am making a basic third person character controller, using Cinemachine and a CharacterController.

The problem I am facing is, that Unity's InputSystem seems to be getting movement from a PS4 controller's stick, even when not in use. Video. (I am not touching the controller)

Could this have something to do with Unity not being tested properly on Linux? Or is this just a problem with the controller?