[CLIENT] Client not recording 'Season highest grades' properly

There are a couple of games in my match history where I've received S grades and not received chests, due to already using up my 4 chests per month. That's fine, obviously part of the design. But the where the champion list records the season highest grades on each champion, the previous highest grade is still recorded.

See http://imgur.com/a/6BUX3 for screenshots. These games were played in 7.13 i think.