Comment by iamcalledrob

Surprisingly, this is an issue on Windows and Linux too -- macOS has just joined the sad party.

The location of the drag region is either the 10px-or-so just outside the window (GTK apps), or just inside the window (I see this in Electron apps). On GNOME, anyway.

On Windows this is caused by the removal of the thick window border with Win10. It wasn't really removed, it was just made transparent instead, thus the drag region moved outside the visible window to avoid the content size changing (for backwards compatibility). Apps often end up in a broken state too, because if you eschew system decoration, you lose the invisible border (which you don't even know you have), and it's easy to end up with a 1px drag region.

It's infuriating, because of the issue the author highlights -- you try and grab the window corner and fail.

It's a sad state of affairs, and a great example of how the basics are going backwards on desktop.