Ionic transition animation between states overlaps content

I have an Ionic project that has some states and sub-states. When a transition throw states occurs everything goes fine, but when the transition is to a sub-state it looks like the animation doesn't work so fine because the next state content overlaps the current state content.

This project exemplifies what's going on:

Link: http://codepen.io/andrewmcgivery/pen/azBjdB

When the Scientific Facts button was clicked, the current state text is overlaped by the next state text. So there's some work arround to fix the animation ?