Intermittent bug occurring when re spawning

Guys I've got an intermittent re-spawning issue. If my character receives to kill shots within milliseconds of each other. Rather than re-spawning like normal on mobile devices it re-spawns my character twice. if anyone could point me in the right direction i'd appreciate it. using System.Collections; using System.Collections.Generic; using UnityEngine;

  public class GameMaster : MonoBehaviour
  {
  
      public static GameMaster gm;
  
      [SerializeField]
      private int maxLives = 3;
      private static int _remainingLives = 3;
      public static int RemainingLives
  
      {
          get { return _remainingLives; }
      }
  
      void Awake()
      {
              if (gm == null)
          {
              gm = GameObject.FindGameObjectWithTag("GM").GetComponent<GameMaster>();
          }
      }
  
      public Transform playerPrefab;
      public Transform spawnPoint;
      public float spawnDelay = 2;
      public Transform spawnPrefab;
      public string respawnCountdownSoundName = "RespawnCountdown";
      public string spawnSoundName = "Spawn";
      public string gameOverSoundName = "GameOver";
  
      public CameraShake cameraShake;
  
      [SerializeField]
      private GameObject gameOverUI;
  
      // Cache
      private AudioManager audioManger;
  
      //public HealthBar healthBar;
  
      void Start()
      {
          if(cameraShake == null)
          {
              Debug.LogError("No camera shake");
          }
  
          _remainingLives = maxLives;
  
          // Caching
          audioManger = AudioManager.instance;
          if (audioManger == null)
          {
              Debug.LogError("FREAK OUT! No Audio manager found in scene");
          }
      }
  
      public void EndGame()
      {
  
          audioManger.PlaySound(gameOverSoundName);
  
          Debug.Log("EndGame");
          gameOverUI.SetActive(true);
      }
  
      public IEnumerator _RespawnPlayer ()
      {
          audioManger.PlaySound(respawnCountdownSoundName);
          yield return new WaitForSeconds(spawnDelay);
  
          audioManger.PlaySound(spawnSoundName);
          Instantiate(playerPrefab, spawnPoint.position, spawnPoint.rotation);
          GameObject clone = Instantiate(spawnPrefab.gameObject, spawnPoint.position, spawnPoint.rotation) as GameObject;
          Destroy(clone, 4f);
      }
  
      public static void KillPlayer(Player player)
      {
          
          _remainingLives -= 1;
          if(_remainingLives <= 0)
          {
  
              gm.EndGame();
          }
          else
          {
              gm.StartCoroutine(gm._RespawnPlayer());
          }
          Destroy(player.gameObject);
      }
  
  
      public static void KillEnemy (Enemy enemy)
      {
          gm._killEnemy(enemy);
      }
  
      public void _killEnemy(Enemy _enemy)
      {
          // Let's play some sound
          audioManger.PlaySound(_enemy.deathSoundName);
  
          // Add Particles
          GameObject _clone = Instantiate(_enemy.deathParticles.gameObject, _enemy.transform.position, Quaternion.identity) as GameObject;
          Destroy(_clone, 5f);
  
          // Camera Shake
          //cameraShake.Shake(_enemy.shakeAmt, _enemy.shakeLength);
          Destroy(_enemy.gameObject);
      }
  }
  
  
  using System.Collections;
  using System.Collections.Generic;
  using UnityEngine;
  
  public class Player : MonoBehaviour
  {
      [System.Serializable]
  
      public class PlayerStats
      {
          /*public int Health = 100;*/
         
          
          public int maxHealth;
  
          public HealthBar healthBar;
  
          private int _curHealth;
          public int curHealth
          {
              get { return _curHealth; }
              set { _curHealth = Mathf.Clamp(value, 0, maxHealth); }
          }
  
          public void Init()
          {
              curHealth = maxHealth;
              healthBar.SetMaxHealth(maxHealth);
          }
      }
  
      public PlayerStats stats = new PlayerStats();
  
      public int fallBoundary = -20;
  
      public string deathSoundName = "DeathVoice";
      public string damageSoundName = "Grunt";
  
      private AudioManager audioManager;
      
      [SerializeField]
      private StatusIndicator statusIndicator;
  
      void Start()
      {
          stats.Init();
  
          if(statusIndicator == null)
          {
              Debug.LogError("Error");
          } 
          else
          {
              
              statusIndicator.SetHealth(stats.curHealth, stats.maxHealth);
          }
  
          audioManager = AudioManager.instance;
          if (audioManager == null)
          {
              Debug.LogError("No audio Manager in scene");
          }
  
          
      }
  
      void Update()
      {
          if(transform.position.y <= fallBoundary)
              DamagePlayer(999999);
              
      }
  
      public void DamagePlayer (int damage)
      {
          stats.curHealth -= damage;
          stats.healthBar.SetHealth(stats.curHealth);
  
         
          if (stats.curHealth <= 0)
          {
  
              // Play death sound
              audioManager.PlaySound(deathSoundName);
  
              // Kill player
              GameMaster.KillPlayer(this);
          } else
          {
              // Play damage sound
              audioManager.PlaySound(damageSoundName);
          }
  
          statusIndicator.SetHealth(stats.curHealth, stats.maxHealth);
          
      }
      
  
  }