Only request identify ticket when needed

src/Discord.Net.WebSocket/DiscordSocketClient.cs

@@ -228,7 +228,8 @@ namespace Discord.WebSocket
 
         private async Task OnConnectingAsync()
         {
-            await ApiClient.RequestQueue.AcquireIdentifyTicket(_connection.CancelToken);
+            if (_sessionId == null)
+                await ApiClient.RequestQueue.AcquireIdentifyTicket(_connection.CancelToken);
 
             await _gatewayLogger.DebugAsync("Connecting ApiClient").ConfigureAwait(false);
             await ApiClient.ConnectAsync().ConfigureAwait(false);