Zend certified PHP/Magento developer

Windows 10 search issue

It seems kinda like bug, let me explain.

I occasionally use search feature and don’t like search bar, so I got used to Win+S hotkey combination. Normally, it would open Search box like small window on top of the taskbar, much like if you press Win button (opens Start menu) and then start typing (opens Search window).

But sometimes, when I press Win+S at the same time, the Search box opens on the whole left half of the screen, while the rest half of the screen is just black.

Since it opens up sometimes like that/sometimes like this, without specific conditions, I suspect it’s much like a bug. Or is it?