Page not scrolling in Chrome on iOS

I have this really strange problem. Our Tumblr homepage homepage http://blog.wigo.us doesn't scroll in Chrome on iOS. It scrolls perfectly in any browser on the desktop, in any browser on Android, and in Safari on iOS. But the latest version of Chrome in iOS8 just refuses to scroll the page.

The effect is basically like someone put an overflow: hid on the body element and gave it width = 100%, height = 100%. I have looked through the CSS of the theme and found nothing suspicious. I even run iPhone emulation in google developer tools - everything works fine.

It would be great if someone had a similar problem and could point me in the right direction.