[BookHeretykow]

The thing is, this is not full screen maximize. Mac like most Unix systems (Linux included) can create multiple virtual screens. What this means you have does windows on different screen from your computer point of view.

This is something what you may or may not know as Workspace from Windows or KDE but on steroids.

How virtual screens are handled by the OS is different story. As a user of ungodly discussing i3 tailing manager I can only say, problems you described I personally consider as terrible design and putting look over functionality.

Basically this looks like OS X do care only for current screen if it's full screen or for any screen if it's not. What's inconsistent (terrible UX) and hard to use (also terrible UX).