Another slight anomaly I’ve just found whilst trying to duplicate the log-in problem.
I narrowed the displayed window, so that I could use two different browsers side by side.
Chrome, Opera, Edge & Avast all work as expected when you narrow the window width; the seamlessly change from the Dark Blue/Pale Blue/Dark Green banner, to the Pale Blue/Orange Three Lines/Dark Green heading.
Firefox & Pale Moon both have an intermediate step where Subscribe from the Pale Blue line overlaps the dark Green line, rendering its shortcuts unavailable.
Screenshots below from Firefox;
As narrow as possible whilst still displaying correctly

Slightly Narrower;

Try Clicking on Forums, Help etc.

A little narrower still and back as it should display;
Bill