Then there's something else broken because that does not work. There are other games with the same name that were listed on IGDB so it may be causing issues.

I have a feeling it's something to do with the "Twitch name" field in the general settings for the game, but no streams are coming up (though they are on twitch itself). I wonder if it's related to this game having name conflicts.

Game is Curiosity, the twitch 'category' is curiosity-1, and the IGDB url has curiosity--2. I've tried all three values in the twitch name field but nothing shows up on the speedrun streams page.

I browsed around, and many games have no streams listed, but not always, so I wonder if this is frequently misconfigured.