Coroutine not working when another Scene is first opened.

 using UnityEngine.UI;
 using UnityEngine.SceneManagement;
 
 public class ControlTransition : MonoBehaviour {
 
     public Text text;
     private string[] story = {
         "Noong panahong unang una ay may dalawang mag-asawa na katatanggap pa lamang ng matrimonyong mahal.",
         "Sa pagdaan ng mga araw, 'di nagtagal ang babai'y naglihi na sapagka't dumating na ang pagbubunga ng sakramentong tinanggap nila."
     }; 
     // Use this for initialization
     void Awake () {
         //text = GameObject.Find ("Text").transform.GetComponent<Text> ();
         UnityEngine.Debug.Log (text);
         StartCoroutine ("fadeEffect");
         Debug.Log ("qwe");
     }
     public IEnumerator fadeEffect()
     {    
         Debug.Log ("sabay");
         this.text.text = story [0];
         float start;
         Debug.Log (this.text.text);
         setTransparency (0.0f);
         yield return new WaitForSeconds (2f);
         Debug.Log ("naghintay");
         for (start = 0.0f; start <= 1f; start = start + 0.01f) {
             this.setTransparency (start);
             yield return new WaitForSeconds (0.01f);
         }
             
         yield return new WaitForSeconds (6f);
         for (start = 1f; start >= 0.0f; start = start - 0.01f) {
             this.setTransparency (start);
             yield return new WaitForSeconds (0.01f);
         }
 
         text.text = story [1];
         yield return new WaitForSeconds (2f);
         for (start = 0.0f; start <= 1f; start = start + 0.01f) {
             this.setTransparency (start);
             yield return new WaitForSeconds (0.01f);
         }
         yield return new WaitForSeconds (6f);
         for (start = 1f; start >= 0.0f; start = start - 0.01f) {
             this.setTransparency (start);
             yield return new WaitForSeconds (0.01f);
         }
 
         this.LoadScene ();
         yield return null;
     }
 
     private void LoadScene()
     {
         SceneManager.LoadScene ("map1");
     }
     private void setTransparency(float trans)
     {
         Color color = text.color;
         color.a = trans;
         text.color = color;
     }
 }

my Scene consists of text that is fading when the Scene starts. It works perfectly when i OPENED a scene BEFORE (MainMenu) this scene.. but when the NEXT scene (after this scene) is opened and i Go back MainMenu then opened the said scene.. it doesn't fade anymore.. that main prob is the "yield return new WaitForSeconds(2f)" function.

Thanks for the help :)