Twitch.tv users don't always load?

Hi there,

For my Twitch.tv app, every once in a while not all of the “online” users will load. If I refresh my codepen page a few times, eventually it will happen. Here is the link to my codepen for the Twitch app (I haven’t styles anything yet!) http://codepen.io/OptimusSyme/pen/jVQxVb

Any ideas why this may be? Hoping to use this opportunity to learn more about how the language works.

Thanks!