autocomplete and minChars = 0 is not working?

autocomplete and minChars = 0 is not working?

Hello,  I want to have the following interaction:
 
 - Set the minChars of the default autocompleter to 0
 - When the focus is set to this field, display results from the array, without the user typing any caracter (I only have 5 results values).
 
 
But minChars = 0 is not working, you have to hit the backspace button once in the textbox to make the results appear.
Is that a bug ?
 
Thanks