Twitch extension mobile iOS iframe has a bottom overflow

Hello,

I’m developping an extension for mobile and I have a behavior that happens on iOS only and not at all on Android: the botton of the extension iframe is not the bottom of the container, and I consistenly have a white band below my extension on iOS. It is especially disturbing when popping up the keyboard since it takes more space, do you know why it’s there?

Thanks
Julien