Steps to reproduce the issue

The toogle toolbar button is not hidden on the desktop view and is focussable (can be clicked on)

To make it easier to see add the following code to the template.css

navbar-toggler {
    background: red;
}

Expected result

nothing happens

Actual result

clickable red box

Additional comments

This is because at desktop resolutions the css for the toggler is

.navbar-toggler {
    padding: .25rem .75rem;
    font-size: 1.25rem;
    line-height: 1;
    background-color: transparent;
    border: 1px solid transparent;
}

This makes it contents visually invisible but not hidden from the page and important not removed from the accessibility tree unlike the burger menu icon for toggling the menu on mobile

Burger button (desktop resolution)

Toolbar button (desktop resolution)