Ionic ion-scroll scroll parent page

I am developing an app that looks like this:http://codepen.io/anon/pen/vNOVvb

I am using ion-scroll to do horizontal scroll for the list of images. ion-scroll works fine as what I wanted. But the problem is user can’t do vertical scroll to the full page when dragging on the ion-scroll.

How can I get the parent page vertical scroll works on ion-scroll?

I have also faced the same issue. I tried to work around that and i have already posted this in Stackoverflow. Please have a look at it.