Ion-item with checkbox (stop event propagation)

Hello,

I have ion-item with checkbox in it. Currently if user taps on checkbox, tap event also propagates to ion-item, but I need two different behaviors (one if user taps on checkbox another if user taps on row). If I try to use preventDefault and stopPropagation on checkbox it starts behaving wrong.

Here is code pen: http://codepen.io/alextrs/pen/Iuxht?editors=101

Regards,
Aliaks