On WTDWTF, we’ve been getting reports that users are not being notified when a staff members agrees, disagrees, or defers their custom flags. The automated post is being added to the message that’s attached to the flag, but the user isn’t being notified of this. They don’t find out about the new post unless they visit the Messages page in their profile.
If a staff member manually replies in the message attached to the flag, the notification does get properly generated.
Because of another bug that causes the automatic post to not generate if the flag was created by a staff member, this bug requires a non-staff account to reproduce.