Since recent updates I've noticed that my google hangouts doesn't show a notification dot when there are new messages waiting. In fact when I open the app it takes a second before it even shows the new messages that came in hours ago.
So it seems like its suspending google hangouts and not letting it run in the background to periodically check for messages.
So it seems like its suspending google hangouts and not letting it run in the background to periodically check for messages.