Space Shooter Tutorial - Player Respaner: IEnumerator not executing all code ,

I have completed the Space Shooter tutortioal and currently wanting to impliment a lives system. I'm open to other ways of doing this but so far to avoid re doing the current meachanics I am using IEnumeratore to set the player to active and false. I am using it in the DestroyByContact script.

My goal is to:

1. Set Player active to false

2. wait 3 seconds

3. Set player active to true but with no collider (shot term invincibility)

4. wait 3 seconds

5. Set Player collider to true

For some reason the IEnumeratore just does not work and won't trigger the code after the second wait. If I just have log out put I can get through the two wait times without issue but as soon as I bring in the setactive and collider true/false it breaks. There are no errores in the console.

IEnumerator Function:

     IEnumerator RespawnPlayer()
     {
         Debug.Log("Dead");
         player.SetActive(false);
 
 
         yield return new WaitForSeconds(2);
         Debug.Log("respawn");
         player.SetActive(true);
         playerCollider.enabled = false;
 
         yield return new WaitForSeconds(2);
         Debug.Log("Collider On");
         playerCollider.enabled = true;
 
     }

Full Script

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class DestroyByContact : MonoBehaviour
 {
     
     public GameObject explosion;
     public GameObject playerExplosion;
     public int scoreValue;
     
     private GameController gameController;
 
     private bool gameOver;
     private GameObject player;
     private Collider playerCollider;
 
 
     void Start()
     {
         
         GameObject gameControllerObject = GameObject.FindWithTag("GameController");
         if(gameControllerObject != null)
         {
             gameController = gameControllerObject.GetComponent<GameController>();
         }
         if(gameController == null)
         {
             Debug.Log("Cannot find 'Gamecontroller' script");
         }
     }
 
     void OnTriggerEnter(Collider other)
     {
         if (other.CompareTag("Boundary") || other.CompareTag("Enemy"))
         {
             return;
         }
 
         if (explosion != null)
         { 
         Instantiate(explosion, transform.position, transform.rotation);
         }   
 
         if(other.CompareTag("Player"))
         {
             Instantiate(playerExplosion, other.transform.position, other.transform.rotation);
 
             gameOver = gameController.GameOver();
 
             if(gameOver == false)
             {
                 player = GameObject.FindGameObjectWithTag("Player");
                 playerCollider = player.GetComponent<Collider>();
 
                 
                 StartCoroutine(RespawnPlayer());
               
                 return;
             }
         }
         else // the else stops points being scored from cashing into an enemy/hazzard  
         {
             gameController.AddScore(scoreValue);
             
         }
 
         Destroy(other.gameObject);
         Destroy(gameObject); 
     }
 
 
  
     IEnumerator RespawnPlayer()
     {
         Debug.Log("Dead");
         player.SetActive(false);
 
 
         yield return new WaitForSeconds(2);
         Debug.Log("respawn");
         player.SetActive(true);
         playerCollider.enabled = false;
 
         yield return new WaitForSeconds(2);
         Debug.Log("Collider On");
         playerCollider.enabled = true;
 
     }
 
 }

GameOver function from the GameController Script:

 public bool GameOver()
     {
         if(lives > 0)
         {
             lives = lives - 1;
             livesText.text = "X " + lives;
             gameOver = false;
             return false;
         }
         gameOverText.text ="Game Over";
         totalScoreText.text = "Top Score: " + score;
 
         gameOver = true;
         return true;
     }

Am I using the I enumerator in the wrong way?

Thanks