Games list not updated?

I wanted to answer this question, but to ensure that this game had finished I looked at the profile of the OP, which showed me they were not currently playing the game:

So I thought it was safe to answer. However, after having answered, I noticed that there is not a single 13x13 game in the list. It is a private game, but there are other private games in the last that do show.

So what’s going on here?

Yes, it’s a private game.

Since when do private games not show up in the game list?

For some time now. People complained, it’s hard to find a public game on some profiles, so now it’s hidden to everyone but both players.