With GUI Scale set to Auto, the top two emotes are hidden, and the next two are only partly on-screen. Monitor resolution is 1920x1080. Quark version beta-21, Forge 1937.

Here's what it looks like.

They are all visible if I change GUI scale, but smaller GUI scales aren't usable for me.

Yeah, I am having the same issue on the default Minecraft resolution at normal GUI scale.

Already fixed with a recent commit.