Vertical is not 0 defult !!

hello every one
i have a strong proplem :frowning:
befor that every thing is good but now (with last update for unity) i get a proplem

i write this code:

float moveGo = Input.GetAxis ("Vertical") * speed;
float moveRot = Input.GetAxis ("Horizontal")*speed;
rigidbody.AddRelativeForce (0,0,moveGo);
transform.Rotate(0,moveRot,0);

i put a secript on sphare model
when i run my game, spahre is directly move
the Vertical is 1 value alwas, i do not press any thing
but horizontal is 0 value !! and increse if i press A or D only

where is my error ??

Check for any controllers plugged in to a usb slot that might be leaning on their joystick? granted it would have to be a perfect positioning to get 1 on the vertical but nothing on the horizontal, but just a thought.