Android touch joystick values do not return to 0,0,Android touch Joystick Input never goes back to 0,0

I am using the joystick pack from asset store and I am using the android screen simulator option in unity. Everything works fine but when I stop touching the joystick or take hands off of the screen, the joystick should go back to it's center and so should it's value from 0.6,0.8 or whatever back to 0,0 because I am not giving any input, but that is not the case, the value stays the same and the player keeps running. I cam stop him by placing the joystick in the middle before releasing it so that the value is near zero so that the player doesnt run.