I can't scroll on a The Outline article page

https://theoutline.com/post/6619/paying-refugees-to-train-algorithms-is-a-bad-idea?zd=1&zi=x7ufssi3 The Outline has these full page title cards that you have to scroll through to get to the content. In Firefox mobile for Android, I have trouble scrolling through it. Sometimes it works, sometimes is scroll but then jump back up to the title card and locks in place, but most of the time it's just stuck in the title card. It works in Chrome mobile for Android and I tried disabling my extensions but it stil ldonset work.