Steps to reproduce the problem:
1. Go to https://shop.polymer-project.org/
2. When scrolling down the address bar is hidden automatically (Works as expected)
3. Navigate between links
4. When scrolling down the address bar doesn't  hide anymore (Doesn't work as expected = UI BUG)

What is the expected behavior?
1. Go to https://shop.polymer-project.org/
2. When scrolling down the address bar is hidden automatically (Works as expected)
3. Navigate between links
4. When scrolling down the address bar is hidden automatically (Works as expected)

What went wrong?
The address bar should be hidden automatically using the scroll down gesture, even after changing the URL.

Did this work before? N/A 

Chrome version: 60.0.311.72  Channel: stable
OS Version: 10.3.3
Flash Version: 

In terms of space, my app requires the browser to use this normal behavior of hiding the address bar. I could force this behavior by reloading the page but this affects the PWA perception.

Maybe the issue is related to app-header-layout and iron-pages, I've tested in various ways and I notice that this behaviour it's present when using them.

Any comments or ideas may be helpful, as debugging in iOS is not straightforward Thanks!
 

Deleted: bugAddressBarChromeiOS.gif 2.8 MB

	bugAddressBarChromeiOS.gif 2.8 MB View Download

Deleted: expectedBehaviorBugAddressBarChromeiOS.gif 2.5 MB

	expectedBehaviorBugAddressBarChromeiOS.gif 2.5 MB View Download