User blog comment:Rappy 4187/Technical Update: July 12, 2017/@comment-31863794-20170713211613/@comment-33046846-20170714130113

They mean that will go through some of the renaming processes for users, since there may be some parts where the user's former username is still showing. It's honestly a great idea to go through these bugs, and make sure the renaming is cleaned up - as well as the places where they missed.