I have seen several posts reporting this type of issue but they seem to be dead-ends because they can't be reproduced. However, this is a problem with the official demo.
Scroll down to the 'View multi-page template' button, and click it.
Click the bar link.
Use the browser 'back' button twice.
The problem is the second 'back' stays on the Foo page, instead of returning to the 'Anatomy' page.
This is reliably repeatable.