Back/Previous navigation browser not functioning on Tabs

I implemented a tabs with side menu interface as seen on Things are working well as it was inteded from the tutorial except for an issue. Take this example:

  1. User is on Tab1.
    2, User decides to navigate to Tab2, clicks Tab2.
  2. User wants to navigate BACK to Tab1, clicks previous button on Chrome.
    Issue User is not able to navigate back when previous/back button is clicked, instead the url changes but the active Tab does not.

The repo I am working on is at

Tabs have not that functionality because it does not push its linked page. Page becomes root page of navigation. Have no sense go back when last tab it is just at bottom. At least I think so.

That would be correct

Had a look on apps using tabs, back button works perfectly.