I just recieved a S- Rank from playing a game of legend of Poro King, and didnt recieve a loot box or mastery token. Does this game type not support mastery rewards or is this some sort of bug? Im aware that you can only recieve loot boxes once a week and according to my profile page, I have been able to recieve on for a few days.
For the mastery token, you are only able to earn them while playing normal or ranked Summoner's Rift. You cannot earn them while playing ARAM, Twisted Treeline, or any of the rotating game modes.
For the chest, you can only earn one chest per champion per season. Once you earn a chest with a champion, you will be unable to earn any more chests while playing as that champion until the next season.
