Push new page in tab page


I want to push a new page when I push on a button inside a tab page.
So I’ve got a page that contains tabs. While I’m in a tab page I want to navigate to another page.
When I press back I want to go back to the tab page I was in.

At this time I’m able to navigate to another page from the tab page. But when I hit the back button it doesn’t navigate to the previous (Tab) page but it navigates back to the page before that.

How can I fix ti?