OnControllerColliderHit isn't being right before a move?

Unity Engine
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1

When a player hops on a rail in my game I set friction to 0 and make the railGrindingSFX volume to 1.

   private void OnControllerColliderHit(ControllerColliderHit hit)
    {
        if ( hit.transform.CompareTag("Rail") )
        {
            velocity = new Vector3(cam.forward.x, 0, cam.forward.z) * railSpeed;
            Accelerate(acceleration);

            speed = Mathf.Clamp(speed, baseSpeed, maxSpeed);

            friction = 0;
            railGrindingSFX.volume = 1;
        }
    }

but since there’s no OnControllerColliderExit I have to constantly update these values to be their defaults in updates and I need to do it right before the OnControllerColliderHit runs so that it can override the default values.

Luckily, it says that OnControllerColliderHit is called when performing a move operation, which should mean that this should work right?

        railGrindingSFX.volume = 0;
        friction = baseFriction;

        mover.Move(direction * speed * Time.deltaTime);

But this doesn’t work. The friction stays at the default value while I’m on the rail. If I change it to this instead:

    private void OnControllerColliderHit(ControllerColliderHit hit)
    {
        friction = baseFriction;
        railGrindingSFX.volume = 0;

        if ( hit.transform.CompareTag("Rail") )
        {
            velocity = new Vector3(cam.forward.x, 0, cam.forward.z) * railSpeed;
            Accelerate(acceleration);

            speed = Mathf.Clamp(speed, baseSpeed, maxSpeed);

            friction = 0;
            railGrindingSFX.volume = 1;
        }
    }

this will work except when I get off a rail, it won’t reset the values until I land on something that isn’t a rail. Is this a bug in the character controller or something?