I'm noticing that when having the game open and going to another browser tab to do something else (like read this forum), and then I return to the game tab, all timers have slowed down substantially and only continue to run when I'm back on the game screen. Example: Coin production 1 hour when I leave, I stay on the forum for 20 minutes, return to the game and the countdown is at something like 50 minutes instead of 40. I wonder if this qualifies as a bug or if that's intentional to take load of the clients (our PC's). As stated above by others, clicking any item of the menu (build, manage army, tech tree etc) and then returning to the main screen updates the timers. Using Chrome.