Can SceneUnloadAsync be used in a Coroutine?

Questions & Answers
1

I have a very simple function that is called from other places to load a scene async, just passing in the buildIndex. It works fine. Then, I decided to create a mirror of that function, for scene unloading. And it doesn’t work, no matter how I tweak it.

public static IEnumerator Unload(int buildIndex)
	{
		Debug.Log("Unloading " + buildIndex);

		if (buildIndex >= 0)
		{
			AsyncOperation operation = SceneManager.UnloadSceneAsync(buildIndex);
			yield return new WaitWhile(() => !operation.isDone);
			Debug.Log("good to go");
			// extra code here
		}
	}

The “good to go” is never logged, even though the scene is visually unloaded.
I’ve tried replacing the WaitWhilewith other types of yields, with no success. Is there anything specific to sceneUnloading that makes it not continue the coroutine steps?

2

Upon further testing, it seems that yielding return after the UnloadAsync has started is what breaks it (regardless of the type of yield return used).

I’m inclined to believe that this is because once the scene is unloaded, the function call to the couroutine is “unloaded” with it, and therefore it cannot be resumed.

It’s a bit frustrating, and maybe I’m missing something, so any sort of confirmation/further clarification would be appreciated.