Camera freelook jitter when I first move the player

Its a 3D platformer game with freelook camera. It follows the Player parent gameobject. Player has rigidbody Interpolate. It always jitters when I first move for a few seconds and then everything feels smooth after that. Same thing with the game controller. Why is that?

Code (CSharp):

1.  private void SetVelocity(Vector3 velocity)
2.     {
3.         MyRigidbody.velocity = velocity;
4.     }
5.  
6.     private Vector3 CalculateMovementDirection()
7.     {
8.         Vector3 velocity = Vector3.zero;
9.  
10.         float horizontalInput;
11.         float verticalInput;
12.  
13.         //Get input;
14.         horizontalInput = Input.GetAxis("Horizontal");
15.         verticalInput = Input.GetAxis("Vertical");
16.  
17.         velocity += transform.right * horizontalInput;
18.         velocity += transform.forward * verticalInput;
19.  
20.         if (velocity.magnitude > 1f)
21.         {
22.             velocity.Normalize();
23.         }
24.  
25.         return velocity;
26.     }
27.  
28.     private Vector3 CalculateMovementVelocity()
29.     {
30.         Vector3 velocity = CalculateMovementDirection();
31.  
32.         velocity *= playerStats.MyMoveSpeed;
33.  
34.         return velocity;
35.     }

 

nvm i fixed it