ConnectionLostException when invoking re-assigned Remote Targets about vs-streamjsonrpc HOT 3 OPEN

  public static bool removeClient(int id)
   {
     if(Clients.TryGetValue(id, out var client)){
       //client.Rpc.Dispose();
       var timeout = new CancellationTokenSource(2500);
       try
       {
         LogTo.Debug("... starting close handshake");
         client.Socket.CloseAsync(WebSocketCloseStatus.NormalClosure, "Closing", timeout.Token)
         .ConfigureAwait(false).GetAwaiter().OnCompleted(() =>
         {
           LogTo.Debug("... close handshake completed");
           client.Rpc.Dispose();
           Clients.TryRemove(id, out _);
           foreach (var c in Clients)
           {
             Task task = c.Value.Rpc.NotifyAsync("removeClient", client.SocketId, client.Name);
             _ = Task.Run(() => task);
           }
         });
       }
       catch (OperationCanceledException ex)
       {
         // normal upon task/token cancellation, disregard
       }      
     }
     return true;
   }

   public static int AddRemoteTarget(string originName, string targetName)
   {
     int originId = GetClientIdByName(originName);
     int targetId = GetClientIdByName(targetName);
     ConnectedClient origin;
     ConnectedClient target;
     if (originId != 0 && Clients.TryGetValue(originId, out origin)
       && targetId != 0 && Clients.TryGetValue(targetId, out target))
     {
       origin.Rpc.AddRemoteRpcTarget(target.Rpc);
       return targetId;
     }
     return -1;
   }