No connection on iOS 14

[olgv]

Version Number and Operating System(s):

Unity 2019.4.30f1
macOS 11.4 with Xcode 12.5.1
iOS 14.8

Expected behavior:

iOS application running as client used to connect to computer running as Server

Actual behavior:

since iOS 14 the Unity app is not connecting anylonger

Steps to reproduce:

I can share the project, though is a big one
As far as we got is to the point where Xcode reports the following, while running the app connected to Xcode. The networking works between to computers, Windows or macOS, but not on iOS devices.

InvalidProgramException: No route to host

at BeardedManStudios.Forge.Networking.CachedUdpClient.DoSend (System.Byte[] dgram, System.Int32 bytes, System.Net.IPEndPoint endPoint) [0x00000] in <00000000000000000000000000000000>:0
at BeardedManStudios.Forge.Networking.NetWorker+<>c__DisplayClass232_1.b__1 () [0x00000] in <00000000000000000000000000000000>:0
at System.Action.Invoke () [0x00000] in <00000000000000000000000000000000>:0
at System.Threading.WaitCallback.Invoke (System.Object state) [0x00000] in <00000000000000000000000000000000>:0
at System.Threading.ContextCallback.Invoke (System.Object state) [0x00000] in <00000000000000000000000000000000>:0
at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00000] in <00000000000000000000000000000000>:0
at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00000] in <00000000000000000000000000000000>:0
UnityEngine.UnhandledExceptionHandler:PrintException(String, Exception)
UnityEngine.UnhandledExceptionHandler:HandleUnhandledException(Object, UnhandledExceptionEventArgs)
System.UnhandledExceptionEventHandler:Invoke(Object, UnhandledExceptionEventArgs)

(Filename: currently not available on il2cpp Line: -1)

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