The retort plug-in I use for the post emoji reactions is end of life’s. There is a replacement, but no way to easily migrate that data from one solution to the other.
I’ll be changing it over later tonight and once I do we will lose the old emojis that people have done. The new solution is officially supported by Discourse and we should be good thereafter.
Apologies. Wanted to make sure people realized what happened when the old ones disappear.