Jetpack Carousel Won't Close

Greetings,

I’ve noticed a bug since upgrading to WordPress 4.0. It appears that my jetpack galleries won’t close and return me to the page. The “x” doesn’t close the carousel, and hitting the “ESC” key doesn’t do the trick either.

Here’s a link to a troublesome post so you can see what’s going on: https://scifimafia.com/2014/09/haven-teases-answers-in-webseries-haven-origins-plus-clip-from-the-new-episode

Any ideas why?