When I click to close the XChat window, it asks whether to "Quit", "Cancel" or "Minimize to Tray". If I select "Minimize to tray" then the XChat disappears and I am not able to see the application again.
I have checked the process list and it is there in running state. Normally in earlier versions of Ubuntu it would show a XChat icon in the top panel bar.
I have not added the Xchat as sticky icon in my application panel. I hope there must be some work around or setting for it.