FollowObject script not working on spawned enemies

I have a FollowObject script, shown here:

 public Transform Player;
 public float MoveSpeed = 4;
 public float MaxDist = 10;
 public float MinDist = 5;
 
 void Update ()
 {
     transform.LookAt (Player);
 
     if (Vector3.Distance (transform.position, Player.position) >= MinDist) {
 
         transform.position += transform.forward * MoveSpeed * Time.deltaTime;
 
         if (Vector3.Distance (transform.position, Player.position) <= MaxDist) {
             //Here Call any function U want Like Shoot at here or something
         } 
     }
 }

It works fine when I have an enemy prefab in the game world when I start. However, when I spawn an enemy (or multiple enemies) with this script:

 public GameObject prefabToSpawn;
 public float spawnTime;
 public float spawnTimeRandom;
         private float spawnTimer;
         // Use this for initialization
 void Start ()
 {
     ResetSpawnTimer ();
 }
 
 // Update is called once per frame
 void Update ()
 {
     spawnTimer -= Time.deltaTime;
     if (spawnTimer <= 0.0f) {
         Instantiate (prefabToSpawn, transform.position, Quaternion.identity);
         ResetSpawnTimer ();
     }
 }
 
 void ResetSpawnTimer ()
 {
     spawnTimer = (float)(spawnTime + Random.Range (0, spawnTimeRandom * 100) / 100.0);
 }

They do not follow the player; instead, they move towards the place where the player originally started.

Any ideas? I'm not entirely sure what the problem would be here.