On the Android app, when attempting to add a reaction to someone else’s comment, it takes about 4-10 seconds for the list of emojis to load (seems to just be the images of the emojis and not the clickable zones themselves as clicking before the images load successfully adds the reaction). When the emoji list is opened again soon after, then the images are already there. But might be a cache thing because some time later it will take a long time to load again.
This is a pretty big different from the desktop where it is near instantaneous. I wonder if there’s a way to significantly lower the load time.