Menu Glitch

The following is a bug relating to the menu:

1) if the viewport is shrunk to a small size making the primary menu a collapsed toggle button, and if that toggle button is clicked so as to open the menu, AND THEN the viewport is resized to a greater width, the menu items display weird. This does NOT happen if the collapsible menu remains collapsed and then the viewport is resized to a greater width–in that case, everything looks normal.

2) the same bug thus also happens on mobile if one switches from portrait to landscape by turning their device. Note that the whole area the drop-down menu would take up also remains.