Keys

This isn't a bug, it's actually intended. The drop rate for keys goes down the more of them you get, and resets once per month. If you aren't getting any keys, first make sure you know they only drop from games you won, and think about when you first got a key- if you can remember that is. If not try just waiting a while and see if the drop rate increases. Hextech crafting isn't meant to shower people in free stuff anyways, unless you have tons of money that is.