Hello, I use bspwm as window manager. It sends close signal on super + x keys.
On Inkscape thats OK, I get the dialogbox if there are unsaved changes.
On Godot 3 the window closes brutally. And sometimes I press this shortcut by mistake. Its annoying to loose the work I'm doing.

I see that same difference between Inkscape and Godot with xdotool so every X11 user can reproduce.
xdotool search --name "title" to get the window id.
xdotool windowquit someid or xdotool windowclose someid to request closing.

I already asked on bspwm reddit.