I’m encountering an issue where my character in Unity experiences unexpected jitter in the Y-axis while moving. This jitter is unwanted and disrupts the smoothness of the character’s movement. I’m utilizing a Rigidbody component for character movement. How can I resolve this Y-axis jitter and ensure consistent and smooth character movement

my code :

public class PlayerMovement : MonoBehaviour
{
    public float moveSpeed = 6f; // The speed at which the player moves

    private Rigidbody rb;
    private float horizontalInput;

    private void Start()
    {
        rb = GetComponent<Rigidbody>();
    }

    private void Update()
    {
        horizontalInput = Input.GetAxis("Horizontal");
    }

    private void FixedUpdate()
    {
        // Calculate the movement force
        Vector3 movementForce = new Vector3(horizontalInput * moveSpeed * 2f, 0f, 0f);

        // Apply the movement force to the player's Rigidbody
        rb.AddForce(movementForce, ForceMode.Force);
    }
}

my rigidbody settings :

Mass : 1
Drag : 0
Angular Drag : 0.05
Garvity : Checked
Is Kinematic : Unchecked
interpolate : interpolate
Colision Detection : Continuous
Freeze Position : All Unchecked
Freeze Rootation : All Checked

Despite trying various approaches like collider adjustments and performance optimizations, the jitter persists