Ion-nav-view "no-animation" doesn't work in beta.8

Here is the original codepen http://codepen.io/calendee/pen/IcCbn

Take a look at animation attr and ionic version 0.9.26.

<ion-nav-bar animation="nav-title-slide-ios7" 
         type="bar-positive" 
         back-button-type="button-icon" 
         back-button-icon="ion-arrow-left-c"></ion-nav-bar>
         
<ion-nav-view animation="slide-left-right"></ion-nav-view>

If we switch the animation attr to “no-animation” and ionic version to the latest beta.8 then you will see this

So you can find animation however the animation attr disable it.

If you then switch the ionic version to beta.6 then it works fine.
It looks like a bug or is it a correct behavior?

Seems to be a bug, there’s an issue already open for it.

I will add the codepen you provide as an additional resource. Thanks!