Header Menus Renders Shadow That Don't Match Menu

[SporyTike]

Describe the bug
Today I noticed that the header menus shown below are creating weird shadows when they are open. (Check images below)
While it is no major issue and doesn't break anything, it is pret

To Reproduce
Steps to reproduce the behavior:

• Simply hover over a menu and pay close attention to the background around the menu.

Expected behavior
The shadow should either match the box or be not rendered at all.

Screenshots
Images are brightened up and have more contrast to show it more obvious:

Desktop (please complete the following information):
I asked around and people confirmed it shows up in Opera GX, Chrome and Edge.