Rengar can buy normal trinkets

With the new patch a bug has appeared where Rengar is able to purchase the normal lens' along with his special bonetooth ones. Isn't really that big of a deal at face value, but if someone makes the mistake and out of habit buys the normal ones you don't the stacks and really hurts his performance(changing to the bonetooth necklace does not carry the stacks gotten while using a normal trinket).