If you are in chat and notice your chat options bar is missing...the bar along the top of the chatroom where Home More Rooms, Options etc is normally. As in the following image:
It is due to one of three reasons
In any case when this happens you will get a drop down menu at the top right of the chat that has these options in it now. As in the following image.
Note: The dropdown menu is located at the top right of the chat area just above where the cup icon is to go away.