Highest Mastery Score of Season Not Updating
Last time I got an S or S- rank on Ahri 
& it did not update on my Champions page, it still says A+.
Now I just got a game where I got B+ on twitch 
but it still says B in my Champions page.
However the level of my Mastery DOES update (twitch went to level 2 from level 1). I don't know in what way the Champ Rank affects receiving Chests or Mastery Tokens. So far I only noticed the Champion "Season Highest Grade" not updating properly.
Just notifying ! Thanks in advance ! Sincerely, Raven.
and a S- on Caitlyn 
and they are both still saying A+ and A. I contacted support about it to see if they can give any kind of answer, just waiting on a reply back.
and that updated. Got an S on Elise 
and that one didn't update. My others still haven't updated.
and it didn't update........[slayer-jinx-unamused]
and it didn't update with no chest..come to think of it I didn't get a chest with the Sivir S+ either.
in level 5, but it still say N/A. I've gotten 3 S- on him. For the last 3 patches it have bin no update on Highest Mastery Score on any champion except when I get an S for a chest. I'm guessing this is a different function that activates the archive.