On https://community.wanikani.com/ I got a notification that someone liked my post, following by a “great reply” notification. This like was indeed the 50th like for that post. However, it says I earned the “great reply” badge 5 days ago. I’ve seen this happen at least one time before.
I made this post 5 days ago, but I would think the badge “grant date” should be based on… well, when it was granted, which is why I put this under #bug. If this is intended, just let me know.