[CLIENT] Akali appearing in my champ roster even though I don't own her

I was in a champ select about to pick my champion when I noticed that Akali was pick able even though I don't own her, she isn't free and I wasn't gifted her because after the game she is in the store still. I didn't play her but it gave me the option to lock in as her. I'm not sure how I caused this bug or how to reproduce this. I haven't had this problem before or with any other champions.