Object keeps snapping to camera size on play

I’m in the process of making my gameobject move when I drag it across the screen on touch. But my current issue is when I press play to test the game, game object snaps to the size of my camera on the Y. The camera by default is set to a size of “5”. The game object will jump to the “5” position on play. I cannot figure out why. Instead of the object staying at the -4.5f like I have in the Vector3, it jumps to the camera size.

Here is what I have:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PaddlePosition : MonoBehaviour
{

    // Start is called before the first frame update
    void Start()
    {

    }

    // Update is called once per frame
    void Update()
    {
        OnFingerDrag();
    }

    private void OnFingerDrag()
    {
          Vector3 fingerPosition = new Vector3(Input.mousePosition.x, -4.5f, 0.0f);
          Vector3 objectPosition = Camera.main.ScreenToWorldPoint(fingerPosition);

          transform.position = objectPosition;
    }
}

You need to define a distance from the camera that you expect the plane at which you would like to translate the world point to as the z/3rd parameter of the Vector3 passed. Change the ScreenToWorldPoint() line to this:

Vector3 objectPosition = Camera.main.ScreenToWorldPoint(new Vector3(fingerPosition.x, fingerPosition.y, (transform.position - Camera.main.transform.position).magnitude));