Claimed Reward From Tournament Not Appearing In Collections

Hi, a month ago I watched the Redbull Home Ground tournament and claimed the "Clutch card" in my drops inventory. However, a month later, I still haven't received it in my collections. Every other reward I have claimed is in my collections, but for some reason this card is the only one that isn't. I've tried disconnecting and re-connecting my Riot Games account in Twitch, but nothing has changed.