Why does instantiating a prefab break the original's behaviour

I am trying to create a simple version of Quidditch from Harry Potter. I've got two opposing teams, that try to touch the gold ball that flies randomly. When I have two game objects in the scene, they chase perfectly. However, when I then try to spawn more teammates, the previous player stops tracking the gold ball. I have been scouring the internet and I haven't been able to figure this out. Please help me.

Here is the player script:

 public class Gryffindor : MonoBehaviour {
 
     public static float maxVelocity = 16;
     public static float maxAcceleration = 20;
     public static double tacklingProb = 0.3;
     private static Rigidbody rb;
     private static GameObject snitch;
     private static GameObject[] enemy;
     private static GameObject[] team;
 
 
     // Use this for initialization
     void Start () {
         
         rb = GetComponent<Rigidbody> ();
         rb.useGravity = false;
         snitch = GameObject.FindGameObjectWithTag ("Snitch");
         enemy = GameObject.FindGameObjectsWithTag("S");
         team = GameObject.FindGameObjectsWithTag("G");
 
     }
     
     // Update is called once per frame
     void Update () {
 
         //transform.rotation = Quaternion.LookRotation (rb.velocity, Vector3.up);
     
         rb.AddForce ((snitch.transform.position - transform.position).normalized*maxAcceleration*Random.value, ForceMode.Acceleration);
         
     }
 
     void tackled (){
         rb.useGravity = true;
     }
 
     void OnCollisionEnter(Collision enteredCollider) {
         if (enteredCollider.gameObject.CompareTag ("KillZone") && rb.useGravity)
             Destroy (gameObject);
     }
 }
 

And here is the spawner script:

 public class GSpawn : MonoBehaviour {
     
     public int playerCount;
     public GameObject gryfPrefabs;
     GameObject gryClone;
     // Use this for initialization
     void Start () {
         //playerCount = 0;
     }
     
 
     void FixedUpdate () {
          
         if(Input.GetKeyDown("d")) { 
             spawnPlayer(); 
         } 
 
     }
 
     void spawnPlayer () {
         gryClone = Instantiate(gryfPrefabs,transform.position, Quaternion.identity) as GameObject; 
         gryClone.transform.position = transform.position; 
     } 
 }

I have the spawner linked in the inspection window as well. Thank you.