Question about threefold repetition

   I just want to know if this is a bug, or if there is something else I didn't notice.

You need to click on the Draw icon/button.  Its not automatic.

So it is my opponent that clicked on the Draw button?

You can claim it after 3, but it's automatic after 5.

You can also claim a draw with the 50 move rule, but IIRC that one is automatic after 75.

It has always been automatic when I have experienced the implementation of this rule. The above comments seem to be pulled out of some hat, or so. 

I suffered a 15 year repetition once. Y'ever see the movie G-Day with Bill Murray? *shivers*

Thank you for all your answers, I now understand how the threefold repetition works in this site.