diff --git a/Assets/Scripts/LevelConfig/WaveObserver.cs b/Assets/Scripts/LevelConfig/WaveObserver.cs
index 4d6e660..6434f7f 100644
--- a/Assets/Scripts/LevelConfig/WaveObserver.cs
+++ b/Assets/Scripts/LevelConfig/WaveObserver.cs
@@ -20,10 +20,20 @@ public class WaveObserver : Singleton<WaveObserver>
 
     public void Init(WaveConfig config)
     {
+        _subjects.Clear();
+        _aliveEnemyCount.Clear();
+        _intervalTiming.Clear();
+
         _levelConfig = Object.Instantiate(config);
         _copyConstantSpawn = new List<int>();
         _copyGroupSpawn = new List<List<int>>();
         _groupSpawnTimers = new List<float>();
+
+        _spawnerTiming = 0;
+        _currentGroupIndex = 0;
+        _once = true;
+
+
         if (!_levelConfig)
         {
             Debug.LogError("level config was null");
@@ -59,6 +69,7 @@ public class WaveObserver : Singleton<WaveObserver>
      */
     public void Attach(SpawnerTile spawnerSubject)
     {
+        if (_subjects.Contains(spawnerSubject)) return;
 
         spawnerSubject.Prefab = _levelConfig.GetRandomSpawn().GetEnemyObject();
         _subjects.Add(spawnerSubject);