Observed some bot behaviour recently that can be loosely interpreted as cheating. It's also quite reproducable too.
It all revolves around hiding in a bush. Sometimes, even when the bot is no where near you, you can slip into a bush and attempt to recall. Then, all of a sudden out of the blue you'll eat an Ez, or Lux ult. Sometimes when you out fox a bot (ie when you get into a bush and they 'lose' you, and start pacing back and forth) and begin to recall, a few seconds later, they'll just randomly realise that you were there. I have even had a Yi and Jax leap to me in a bush, when there was nothing of the enemies in there (for those who haven't played either champs, both their jumpy moves need to be targeted on another entity).