After Instantiating my gameobject twice one of the 2 script doesn't work

Here are the two scripts for my bird in my bird shooter game i made as a beginner practice on my own.

The problem is after instantiating twice the AI file doesn't work only it changes position on collision as the col file compiles. Yes i have examined the inspector in attaching the files Yes i have tried recreating the prefeb /////

The Bird Collision file, i thought separating it might solve the problem and i'm still asking help.

 using UnityEngine;
 using System.Collections;
 
 public class BirdCol : MonoBehaviour
 {
     public BirdAI xX; //accessing the variable
     public GameObject Bird;
 
     void OnCollisionEnter(Collision col)
     {
         if (col.gameObject.tag == "Bullet")
         {
             Destroy(gameObject);
             xX.x = Random.Range(0, 3);
             Instantiate(Bird, xX.Points[xX.x], Quaternion.identity);
             print(xX.x);
         }
     }
 }

//This is the basic AI

 using System.Collections;
 
 public class BirdAI : MonoBehaviour
 {
     public Vector3[] Points;
     private int CurrPoint;
     private int nextPoint;
     public float speed;
     public int x;
 
     // Use this for initialization
     void Start()
     {
         x = Random.Range(0, 3);
         transform.position = Points[x];
     }
 
     // Update is called once per frame
     void Update()
     {
         if (transform.position == Points[x])
         {
             x = Random.Range(0, 3);
         }
 
         if (transform.position != Points[x])
         {
             gameObject.transform.position = Vector3.MoveTowards(transform.position, Points[x], speed * Time.deltaTime);
             //        print (x);
         }
     }
 }