Different behaviour background of modals between beta14 and 1.0 release

We have just upgraded from Ionic beta 14 to the Ionic 1.0.0 release. After the upgrade we have one issue left which I can’t solve.

I have added 2 CodePens to show the problem, being:

1.0.0-beta.14: http://codepen.io/anon/pen/LVxxzM
1.0.0: http://codepen.io/anon/pen/rVjjYJ

If you look at the 1.0.0-beta.14 CodePen and open the modal by hitting the button top right and you make your browser view smaller than 680px you will see that the modal still has a dark background around it.

Do the same with the 1.0.0 CodePen en you will see the dark background color is gone. Any ideas howto fix this?

Add next CSS:

@media (max-width: 680px) {
    .active .modal-backdrop-bg {
	opacity: .5;
	transition: opacity 300ms ease-in-out;
	background-color: #000;
    }
}