Comment by crazygringo

How does that even work?

When you launch an application or open a dialog, you expect the new window to "steal" focus. When you close a dialog, you expect focus to go back to the main window. If it didn't, it would impair usability.

So how would an OS decide when "stealing focus" is allowed and when it is not?

Like, I'm frustrated with it too. I hate when an app pops up a dialog while I'm typing and my next keystroke dismisses it and I have no idea what I've done. But at the same time, I'd hate to have to manually switch focus to a pop-up dialog every single time before dismissing it with Enter or Escape too -- that would be way too annoying in the other direction.