[REQUIRED] Please fill in the following fields:

• Unity editor version: 2021年3月29日
• Firebase Unity SDK version: 10.0.1
• Source you installed the SDK: Unity Package Manager
• Problematic Firebase Component: RealtimeDatabase
• Other Firebase Components in use: Auth
• Additional SDKs you are using: Facebook, UnityAds, Google playgames services
• Platform you are using the Unity editor on: Windows
• Platform you are targeting: Android
• Scripting Runtime: Mono and IL2CPP

[REQUIRED] Please describe the issue here:

In yesterday, reading and writing data was working fine.
However, this morning when I opened the editor to test the game, I was often unable to read the data in the database. I tried different login methods, including Email and Facebook. Among them, FB could not receive the data every time I executed it, while email is some times good and some times bad, and even if it receive data, it is also from the past.
After searching with different prints, I found that the problem lies here: GetUserReference().Child("logs").GetValueAsync();
I used a coroutine to execute this function. I found that when it reaches this line, it often waits indefinitely and then there is no result.

Relevant Code:

IEnumerator LoadID()
{
print("Load ID");
var task = GetUserReference().Child("logs").GetValueAsync();
print("catch the data from base");
yield return new WaitUntil(() => task.IsCompleted);
print("wait for end of coroutine");

 if (task.IsFaulted || task.IsCanceled)
 {
 print(task.Exception);
 yield break;
 }
 DataSnapshot snapshot = task.Result;
 print("retuen result: " + snapshot);
 if (snapshot.Value != null)
 {
 print("load player data");
 LoadJson(snapshot);
 StartCoroutine(LoadCats());
 StartCoroutine(LoadBuilds());
 }
 else
 {
 //SaveID();
 print("no data");
 SaveJson_F();
 //authManager.validateSignIn(true);
 }
}