Unity在firebase GetAsyncValue（）处冻结.ReadyWith（）

Question

我有最新的firebase unity SDK - 4.3.0
我的Unity版本是2017.2.0f3

在我的脚本中，如果我有两次调用GetValueAsync（）。ContinueWith（），第一个正常执行，第二个暂停。如果我以某种方式将两个调用合并为一个，则程序在第一次调用时停止 我已经设置了数据库URL和引用。

IEnumerator fetchData()
{
    int fetchGameDataStatus = 0;
    int fetchPlayerDataStatus = 0;
    try
    {
        reference.Child("PitJumping").GetValueAsync().ContinueWith(fetchTask =>
            {
                try
                {
                    Debug.Log("Fetching data");
                    int i = 1;
                    if(fetchTask.IsCompleted)
                    {
                        foreach(var question in fetchTask.Result.Children)
                        {
                            int j = 1;
                            Dictionary<int,string> temp = new Dictionary<int, string>();
                            foreach(var option in question.Children)
                            {
                                temp.Add(j,option.Value.ToString());
                                j++;
                            }
                            gd.dict.Add(i, temp);
                            i++;
                        }
                        Debug.Log("End of task");
                        fetchGameDataStatus = 1;
                    }
                    else
                    {
                        Debug.Log(fetchTask.Exception.Message);
                        fetchGameDataStatus = 2;
                    }
                }
                catch(Exception e)
                {
                    Debug.Log(e.Message);
                    Debug.Log("In fetch task catch!!!");
                    fetchGameDataStatus = 2;
                }
                Debug.Log("Reached");
            });
    }
    catch(Exception e) 
    {
        Debug.Log (e.Message);
        fetchGameDataStatus = 2;
    }
    yield return new WaitUntil(()=> fetchGameDataStatus>0);
    Debug.Log("fetchGameDataStatus = " + fetchGameDataStatus);
    Debug.Log("Going to fetch PlayerData");
    try
    {
        Debug.Log ("Reference set");
        reference.Child("users").Child("sampleUserID").Child("PitJumping").GetValueAsync().ContinueWith(fetchTask =>
            {
                Debug.Log("Task for PlayerData started");
                try
                {
                    if (fetchTask.IsCompleted)
                    {
                        pd.questionsCompleted = int.Parse(fetchTask.Result.Value.ToString());
                        fetchPlayerDataStatus = 1;
                    }
                    else
                    {
                        fetchPlayerDataStatus = 2;
                    }
                }
                catch(Exception e)
                {
                    Debug.Log(e.Message);
                    fetchPlayerDataStatus = 2;
                }
            });
    }
    catch(Exception e) 
    {
        Debug.Log (e.Message);
        fetchPlayerDataStatus = 2;
    }
    yield return new WaitUntil(() => (fetchGameDataStatus>0 && fetchPlayerDataStatus>0));

    Debug.Log("fetched GD= " + fetchGameDataStatus);
    Debug.Log("fetched PD= " + fetchPlayerDataStatus);
}

gd是GameData类的对象
pd是PlayerData类的对象

[Serializable]
class GameData
{
    public Dictionary<int,Dictionary<int,string>> dict;
    public GameData()
    {
        dict = new Dictionary<int, Dictionary<int, string>>();
    }
}

[Serializable]
public class PlayerData
{
    public int questionsCompleted;
    public PlayerData(int x)
    {
        questionsCompleted = x;
    }
    public PlayerData()
    {
        Debug.Log("Empty constructor");
    }
}

很抱歉没有正确关注MCVE，我无法准确找出错误原因 我意识到堆栈溢出已经有similar question，但答案并没有帮助我解决这个问题。