Ping always faild on iOS 14.7.1

Ping localnetwork always faild on iOS 14.7.1. whatever Local permission is on or off.
here is my code. reporduce this problem, please type local network ip like 192.168.1.1, give permission allow.you will see timeout.
ping local network always timeout, ping internet always success.
strange.

Code (CSharp):

1.     public InputField inputField;
2.    
3.     public void OnStratPingButton() {
4.         Stopwatch s = new Stopwatch();
5.         s.Start();
6.         var p = new Ping(inputField.text);
7.         Debug.Log("startping:"+ inputField.text);
8.         while (!p.isDone && s.ElapsedMilliseconds < 3000) {
9.             Thread.Sleep(100);
10.         }
11.         Debug.Log("timeout:"+(s.ElapsedMilliseconds) +"|"+p.time);
12.         s.Stop();
13.     }

 

Can anyone reporduce it?

 

Found the reason is iOS buider for windows's bug
https://assetstore.unity.com/packages/tools/utilities/ios-project-builder-for-windows-15522
please close this thread