I've included featured artist - fa into the tags because I took some of the tags from the original tiebreaker https://osu.ppy.sh/beatmapsets/1838114#taiko/3774272 which included these tags
from my thoughts here, I have no clue...
Currently the rules state that you can not have the fa tags at all unless you can download the song from the fa page. The ranked one was ranked before that was a rule