[CLIENT] <-(I think) :Mastery 6 Token Bug

Hello, I'm the kind of player who stalks the forum but doesn't post or comment often. That being said, Hi, I'm alive.

That aside, I recently played a ranked game as Morgana (mid) and at the time of starting the game I had Mastery rank 4 on her. I played the game, won, and was met with 2 messages in my post game lobby, one stated that I had been promoted from Mastery rank 4 to Mastery rank 5, and another rewarded me with a mastery 6 token for getting an S- with Morgana that game. I was pleased to see that I had played well, but took a break from league for a bit. When I re-logged into League not too long later I went to my Hextech Crafting tab to check how many chests I had / how many key fragments I'd collected and noticed that the Morgana Mastery 6 Token was missing, or rather had not been there in the first place.

Now unfortunately I do not have proof of getting the token, and quite frankly I don't care too much about getting it back for that matter, I just felt obligated to address this issue in case it is an actual bug so that it may be fixed for other players. Hopefully someone with the proper resources can further test this and fix it.

Thank you for your time :) -Doctor Bulba

edit: it just happened again. I hit Mastery 5 with Kassadin, got an S rank in the game, was told i got the token and when i went to go check it immediately after the game, the token was not there.