minimized to tray xchat instance disappears but still running in background

[geekyboy]

In 13.04 when I click the X to close xchat the close dialog opens. I check the box to mimimize the tray, but instead it seems disappear. When I look in the unity notification area the xchat-indicator icon is there, but not marked as already open. When I click xchat it opens a new instance and logs in as one of my backup user. However, the previously opened xchat still seems to be running in the background somewhere. (In the new xchat instance I can see my other user still active, even after an hour or more of the previous xchat instance disappearing.)

xchat shows in my processlist, confirming it is still running.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.