The method SceneManager.UnloadScene return true, but the scene prefabs stay actives

Hello,
I have the next method for unload an additive Scene Loaded with a GUI menu to continue the game if you die.
The code is allocated in a singleton gamemanager instance (with DonDestroyOnLoad applied)

Code (CSharp):

1.  internal void ContinueGame()
2.   {  
3.   if (SceneManager.UnloadScene("RealiveMenu"))
4.   {
5.   _aSource.PlayOneShot(SoundContinue);
6.   settings.balasPlata -= BalasToContinue;
7.   switch (Instance.BalasToContinue)
8.   {
9.   case 1:
10.   BalasToContinue = 2;
11.   break;
12.   case 2:
13.   BalasToContinue = 5;
14.   break;
15.   case 5:
16.   BalasToContinue = 10;
17.   break;
18.   case 10:
19.   BalasToContinue = 20;
20.   break;
21.   case 20:
22.   BalasToContinue = 50;
23.   break;
24.   default:
25.   BalasToContinue = 50;
26.   break;
27.   }
28.   _aSourceMainCamera.Stop();
29.   _aSourceMainCamera.clip = musicGamePlay;
30.   _aSourceMainCamera.Play();
31.  
32.   GameManagerCanvasActive(true);
33.   fxCamera.SetActive(true);
34.   prefabAgua.SetActive(false);
35.   prefabIman.SetActive(false);
36.   _pbCruz.gameObject.SetActive(false);
37.   _textCruz.gameObject.SetActive(true);
38.   _cruzActiva = false;
39.   _lifes = 2;
40.   enableFX = false;
41.   GameStarted = true;
42.   playerController.Reanimate(true);
43.   }
44.    
45.   }

Sometimes the code works well, but sometimes the scene not is unloaded and the method return true.

Can you help me with it?

Thanks in advance
Best regards

 

From documentation of UnloadScene:

Sometimes there might be also certain "lock" scenarios, where some reference is keeping things in memory, even if all GameObjects are supposed to be destroyed.

As a sidenote, if you're already using additive scenes, I'd recommend getting rid of the DontDestroyOnLoad and put your scene manager scripts in a separate scene that you just dont unload during playtime, because (from DontDestroyOnLoad manual):

And from multiscene editing docs:

So in short I'd start with changing to UnloadSceneAsync, then get rid of DontDestroyOnLoad. This will give you finer control of what is happening and should give more consistent results. In a sense you could (almost) treat additive scenes like threads - while they can work together for great results, it's much easier to make them misbehave or "interlock" (in a loose meaning of the word).

 

Thanks for your help, i will try it.

Sorry for my english