Login difficulties, the server can not join

[hx5791]

After upgraded to 1.5.2，I often can not login.

And，I have a host, sometimes,it can display serverlist, this time to create a multiplayer game, others can enter the host, And Not long afterwards,Server not visible , and can not join through direct IP.

sometimes it does not display serverlist, this time to create a multiplayer game, Server not visible,other player can not find it in , and can not join through direct IP.