The Great Reply badge query is using the post’s updated_at column to set when the badge was granted. Liking a post does not reset its updated_at value, so granted at will be set to the post’s creation date, or to the last time the post was edited.
We have a few other queries that are triggered when a user acts on a post that set the granted at time in the same way. For badges where the query is run once daily, for example the Famous Link badge, current_timestamp is used to set granted_at. Could a similar approach be used for queries that are triggered when a user acts on a post?