Nav-view and changing states

Hey guys,

unsure about one aspect of nav-view.
Taking example from the docs.

What exactly does href="#/tab/home on the tab panel item do?
I would think it routes to /tab/home, hence enabling tab.home state. In that state as far as I know only that state’s views and the parent ones are available, however when I change state while on home-tab to tab.facts, switch to different tab and then go back to home using the tab-bar, I’ll end up at the intuitively correct page in the tab.facts state. How comes I’m not in the tab.home state tho? Because when I use the on-page button that has the same href it works as expected.

What exactly is the source of this behavior?

Thanks in advance