Did Riot remove this?

The Team Fire icon would allow the player to use the mastery emote, but instead of showing their mastery it would show the Team Fire icon... It was working for all of patch 6.18 (and I believe 6.17), but in the current patch (6.19) it doesn't work anymore... Is this just a bug or did they make it so we can't do that anymore? I wouldn't understand why if Riot would remove this.