Dangling md-subheader and md-toolbar

[nobarany]

When a md-toolbar with md-scroll-shrink shrinks, the following subheader or md-toolbar doesn't move up to the top of the page, and it just dangles in the middle.
This codepen shows the problem for subheader, which appears only in Chrome (related to issues #1647 and #1726):
http://codepen.io/anon/pen/rVeaaL

But the problem with a second toolbar happens in Firefox as well:
http://codepen.io/anon/pen/QbNwQj

Interestingly, by adding md-scroll-shrink to the second toolbar you can achieve the behavior that you'd expect from the above code (i.e., the second one doesn't shrink).
http://codepen.io/anon/pen/MwyYvj