Chat apps had that behavior since decades ago, ever since Windows95 got a systray. It's nothing new or special, it's kind of expected at this point. Though I t

Chat apps had that behavior since decades ago, ever since Windows95 got a systray. It's nothing new or special, it's kind of expected at this point. Though I think here is a failure of Microsoft to improve the UI and use different symbols for closing the app and suspending it into the systray. Either way, seems like a rather strict interpretation of 25.2. That said, I kind of welcome it. The principle of least surprise is something that should be much more strictly enforced and a lot of social apps make it way to easy to accidentally leak data into the public.