User not showing in menu bar!?

I start the computer and log on with my username and password but the upper right field next to the Spotlight icon (menu bar), where the username should appear, is totally blank. I have to click on the blank space for my username to appear.



Edit: I know where to change the option for showing full name, short name or icon but the username space is always blank, whatever I choose to use, until I click on it.

 

Did not help.