After upgrade to Beta 13, new css rules break my design

After upgrading from Beta 11 to Beta 13, I noticed some css rules were introduced:

ion-nav-view {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #000;

the above breaks my design on some pages, I had to remove it. Why was it introduced? Thanks!

I believe this was introduced in some click-block fixes, but it will be fixed as soon as this gets pushed into master