Connection closing callback fails to be called

[showierdata9978]

This is a problem as it leads to a memory leak, when a server cant send somthing to another client (like a kick command..), fails and raises an exemption.

this is even more of a problem if any chat apps that cant have more then 1 of the same user online, and it fails to call. so they are not purged from the username list. meaning a client cant log back in