Setting ng-animate-children="false" doesn't work within ng-if

See this plunkr:
https://plnkr.co/edit/7qDiemoxZhXMHnf8JpdH?p=preview

There is an `ng-animate-children="true"` directive applied to the `<body>` element, and a second `ng-animate-children="false"` directive applied to a descendant `<ul>` element. Despite the presence of this second, overriding directive, the list items continue to animate when their containing panel's visibility is toggled.
