The behaviour of the top nav bar has changed since version 7.1… for the worse!
Before, when scrolling horizontally the navigation bar would scroll as well. Now it doesn’t.
This means when viewing on e.g. iPhone, you need to zoom in to the nav bar to click anything because the menu items are way too small. Problem is when you zoom in, you lose half the menu bar and can’t get it back on screen by scrolling right! The main page scrolls, but the nav bar remains static.