fix

ygopro-server.coffee

@@ -513,7 +513,8 @@ ROOM_unwelcome = (room, bad_player, reason)->
 CLIENT_kick = (client) ->
   client.system_kicked = true
   if settings.modules.reconnect.enabled and client.closed
-    client.server.destroy()
+    if client.server and !client.had_new_reconnection
+      client.server.destroy()
   else
     client.destroy()
   return

ygopro-server.js

@@ -637,7 +637,9 @@
   CLIENT_kick = function(client) {
     client.system_kicked = true;
     if (settings.modules.reconnect.enabled && client.closed) {
-      client.server.destroy();
+      if (client.server && !client.had_new_reconnection) {
+        client.server.destroy();
+      }
     } else {
       client.destroy();
     }