[Beta Client] Collection Champions page does not update champion rank data after a game

I have just completed a game as Alistar where I obtained an S rank (in a loss, no less). When I flipped to the Champions page to consider who to try to get an S rank with next, I noticed that Alistar did not have the gold "this character has given you its loot crate" border around him. When I looked more closely, it still only remembered a C- best rank this season - this was from a long time ago, whereas over the course of this day I had obtained both an A and a S rank.

In case it helps, Alistar was correctly sorted to the top of the "most recently used" champion list. This was in the open beta PVP.net client.

Closing the client then logging back in fixes the issue.