I have an annoying problem, when the users of my forum click to choose the reaction they are going to use in the post, the emoji picker appears with a very large height, with that in the first post, some reaction emojis are cut, like emoji picker grow sideways instead of growing upwards?
i am definitely no expert on reactions because i don’t use them on my site. but i suspect you might be able to edit and override some of the properties of the discourse-reactions-picker with CSS: