Problem keeping List variables saved when triggering play button

I have made an Editor script (inspector) to a target script called BossScript. the BossScript have 2 vairables of type List< Obsticles>, and List< bool>. Im modifying these variables from the editor script. it all works fine till i trigger the play button and then the variables reset... (like if i had 5 objects on the list, it gets to 0). It worked fine before the last update tho, i used to do it all the time. i tried something with the Serialization but it didn't work either...

Editor script:

 using UnityEngine; 
 using UnityEditor; 
 using System.Collections; 
 using System.Collections.Generic; 
 
 [CustomEditor(typeof(BossScript))] 
 
 public class BossScript_Editor : Editor 
 { 
     public override void OnInspectorGUI() 
     { 
         BossScript t = target as BossScript; 
 
         GUI.color = Color.green; 
         if (GUILayout.Button("Add new obsticle")) 
         { 
             t.obsticles.Add(new Obsticle()); 
             t.showObsticles.Add(false); 
         } 
 
         EditorGUILayout.Space(); 
         EditorGUILayout.Space(); 
 
         GUI.color = Color.white; 
         for (int i = 0; i < t.obsticles.Count; i++) 
         { 
             t.showObsticles[i] = EditorGUILayout.Foldout(t.showObsticles[i], ("Obsticle " + i.ToString()));
             if(t.showObsticles[i]) 
             { 
                 EditorGUILayout.LabelField("Properties:"); 
 
                 t.obsticles[i].time = EditorGUILayout.FloatField("Time:", t.obsticles[i].time);
 
                 t.obsticles[i].isCurrentObjectPosition = EditorGUILayout.Toggle("Current position?", t.obsticles[i].isCurrentObjectPosition);
                 if (t.obsticles[i].isCurrentObjectPosition) 
                 { 
                     t.obsticles[i].pos = EditorGUILayout.Vector3Field("Offset:", t.obsticles[i].pos);
                 } 
                 else 
                 { 
                     t.obsticles[i].pos = EditorGUILayout.Vector3Field("Position:", t.obsticles[i].pos);
                 } 
 
                 t.obsticles[i].obj = (GameObject)EditorGUILayout.ObjectField(t.obsticles[i].obj, typeof(GameObject));
 
                 GUI.color = Color.red; 
                 if(GUILayout.Button("Delete Obsticle")) 
                 { 
                     t.obsticles.RemoveAt(i); 
                     t.showObsticles.RemoveAt(i); 
                 } 
                 GUI.color = Color.white; 
 
                 EditorGUILayout.Space(); 
 
                 EditorGUILayout.LabelField("Effects"); 
 
                 EditorGUILayout.Space(); 
             } 
         } 
 
         if (GUI.changed) 
         { 
             EditorUtility.SetDirty(target); 
         } 
     } 
 }  

BossScript.cs

 using UnityEngine; 
 using System.Collections; 
 using System.Collections.Generic; 
 
 public class BossScript : MonoBehaviour 
 { 
     public List<Obsticle> obsticles = new List<Obsticle>(); 
     public List<bool> showObsticles = new List<bool>(); 
 
     void Awake() 
     { 
         StartCoroutine(SpawnObsticles()); 
     } 
 
     private IEnumerator SpawnObsticles() 
     { 
         float startTime = Time.time; 
         float lastInstantiationTime; 
 
         yield return new WaitForSeconds(obsticles[0].time + startTime); 
 
         lastInstantiationTime = Time.time; 
 
         for (int i = 0; i < obsticles.Count - 1; i++) 
         { 
             print(i + " TIME: " + Time.time); 
             yield return new WaitForSeconds(obsticles[i + 1].time - lastInstantiationTime + startTime);
 
             lastInstantiationTime = Time.time; 
         } 
     } 
 } 
 
 public class Obsticle 
 { 
     public float time; 
     public bool isCurrentObjectPosition; 
     public Vector3 pos; 
     public GameObject obj; 
 }