Sending message just before app closes will not be successful.

[matejdro]

Lets say I want to message phone app I'm about to quit and right after close down app. It will not work, because closing app will apparently interrupt the process.

I guess it is more of minor non-implemented feature rather than bug, but it still hinders user experience as user have to wait about 0.5 second between pressing button and app actually closing (to receive ACK).