Actually, that position was repeated three times. Immediately after that move you should have had a claim draw button (at least according to the FAQ linked).
I think I recall in the past, something about that coming up and there may actually be a bug in the implementation. I'll see if I can find it and link to it.
After move 43:
After move 45:
After move 47:
in this game:
http://www.chess.com/echess/game.html?id=50899507,
after moves 43. ... Qe4, 45. ... Qe4 and 47. ... Qe4 the position and the conditions on the board are the same but i can't claim a draw. I can only offer a draw – that my opponent keeps refusing.
i already checked How do I claim a draw? for support but after making my move and then clicking on the draw button, the game doesn’t ends as a draw... as supposed.
is it a bug? or am i mistaken? thanks for your support!