Apps tile with gaps around them

[allstar87]

I mostly see web browsers do this, but I've gotten other apps to do it as well. It seems to be Gnome-style windows that do it, Cinnamon-style windows don't. I can get Gnome-Boxes, Firefox and Chromium to do this but Xed and Nemo won't.

Here I opened Gnome-Mahjongg, maximized it, then used Gtile to snap it, and the gap around the top and sides appeared.

This often requires an additional Super+G click click to fix. It's already much slower to tile things since it's a multi-step process, but it has to be done twice.