I've always played on full screen, so I have no ability to X out of the game and then go back and play. My only option is to turn off my computer and then wait for it to reboot. After I reboot my computer (which is typically taking 15 minutes), I then get the option to either resume or forteit the game that I had tried to start earlier.
All of the PC players in our country club are having the same issue and most just simply aren't participating in this Clash anymore because of it.
~Nancy