Can't switch to another scene using LoadSceneAsync()

Hi, I'm using triggers on different map positions to preload different scenes. There's a second type of triggers that actually switch to the new scene, depending on their corresponding trigger. What happens is that when I go through 2 different triggers, 2 scenes are preloaded, but when i go to one final trigger to switch the scene, it doesn't activate it.

 public static AsyncOperation async; 
 
 public void StartLoading()
     {
         StartCoroutine("load");
     }
 
     IEnumerator load()
     {
         Debug.LogWarning("Async load started... - " +
             ". . . . . . . . nu iesi din modu asta");
         if (ScenesManager.weGoTo != null)
         {
             async = SceneManager.LoadSceneAsync(ScenesManager.weGoTo);
         }
         async.allowSceneActivation = false;
         yield return async;
     }
 
 public static void ActivateScene()
     {
         Scene s = SceneManager.GetSceneByName(ScenesManager.weGoTo);
         SceneManager.SetActiveScene(s);
         async.allowSceneActivation = true;
     }

The ActivateScene is static because I need to call it from a different script attached to another trigger, to actually switch to a new level. What could be wrong here?

Thank you.