Multiple charges for reward crate

[tatertot478]

I'm not exactly sure if this qualifies as a bug, as I don't believe I received more than the initial crate reward, but the "claim reward" button was continuously clickable, and I was able to queue up a dozen transactions. It was only after I exited the browser and reloaded it that the button disappeared

[EtherBots]

Web3 issue, not solidity, but thanks for bringing it to our attention @tatertot478!