We have discovered a bug with the game, that will affect users that are logged in to the game (i.e. you have a game open in your webbrowser) and then your computer either goes into sleep-mode or goes offline.
This will cause you to potentially miss events from your teammates (movement of troops etc), and it will also cause the countdown-timer to get out of sync with the real time, fooling you that you have more time than you actually have.
Im working on a fix for this, but it will most likely not get into the game until next version.
So in the meantime, the workaround is to refresh your browser (F5) if you think your computer has been in sleep-mode/offline for some time while you had a game open.