Why coroutine gets stopped?

Question

Here's my code:

IEnumerator SceneIsInChange(AsyncOperation SecondScene)
    {
        Snake.SetActive(true);
        print("1: " + FinalLoop);
        while (!SecondScene.isDone)
        {
            yield return null;
        }
        Snake.GetComponent<Animator>().SetBool("Loaded", true);
        print("2: " + FinalLoop);
        while (!FinalLoop)
        {
            yield return null;
        }
        print("3: " + FinalLoop);
        Time.timeScale = 1;
        Loading = false;
        LoadingScene = null;
    }

The problem is that the coroutine gets suspended before print("2: " + FinalLoop); line. (But print("1: " + FinalLoop works) So the problem should be in the first while loop but I can't find it. There's only one single code in that loop but it's supposed to "wait for one frame before resuming coroutine" so it shouldn't stop the coroutine.

Am I wrong about yield return null; meaning or the problem is somewhere else?

Answer 1

Coroutines are stopped when their corresponding game object is deactivated or destroyed, regarding your code logic, it's possible after the scene change, the game object in previous scene as well as Its coroutine are destroyed

Your assumption about yield return null is also true

Answer 2

Thanks to @Hesamom I found a solution:

All you need to do is to add AsyncOperation.allowSceneActivation = false so it won't activate itself right after loading, and then change it to true once you did all you wanted (usually at the last line of coroutine)