When you hit the exit button, a confirmation box will pop up. If you push on the blurred out area around the dialog then push on the exit button again, the application will fail to close. See the video for clarification.
#macOS desktop exit button will break after cancelling exit
covert light
native spoke
emmm - not a big deal I will say, you won't usually exit through the close button. Rage quitting with cmd+Q, and normal exit by the home menu.