I have just seen an answer and three comments with their usernames all acting weird:
What's going on here? It's definitely not migration, and the "deleted-users-username-change-to-user-id" thing had already occurred on 2012 which is 6 years earlier than the year the four posts were uploaded. Is this a bug? Or by design?
Link to posts: https://musicfans.stackexchange.com/a/6478/7708
