I'm not sure whether I'm missing something or if there's a bug regarding threefold repetitions.

In one of my online chess games I have the possibility to repeat the position for a third time (I'm quite sure of this). According to the rules I should be able to claim a draw.

The FAQ states that after executing my move, but before submitting it, I should be able to click something that says "Claim game" to claim a draw. However, I can't see it.

Am I missing something or is it a bug?

That was what I was thinking earlier in the game, when I also had the possibility to achieve a threefold repetition. So I offered a draw and played the move that lead to a threefold repetition. However, my opponent just played on, so that doesn't seem to work :(.

I just found out how it works here. I have to submit my move first. Then my browser goes to the next game, so I have to go back to this game, where the "Claim draw" link has appeared.

It's a bit different from how this works in OTB games (there you have to claim before you move), but it works.

Agreed. I was wondering the same thing. In my game, I was quick enough, but I do have opponents who make their moves really fast.

I've never encountered a conditional move in this situation yet, but I guess an opponent can succesfully prevent you from making a claim this way.

How about testing it in an unrated game? Challenge me to an unrated game if you want to test it.

For example, after 1.Nf3 Nf6 2.Ng1 Ng8 3.Nf3 Nf6 4.Ng1 Ng8, then after 5.Nf3 white should be able to claim a draw.

However, if black sets up a conditional move (other than 5...Nf6) then I suspect white won't be able to claim a draw.

LazyChessPlayer3201 and I have played a test game and I can confirm that a conditional move indeed breaks the ability to claim a draw. I have reported this as a bug.