Simcity hangs on loading city

I had this problem also.  It seems that if you do not claim a city, you can not load same city. Here's a scenario – Create a region (any configuration) and only claim one city.  Play the one city for awhile but decide to add a second city.  Go to region panel from the main menu and select new city.  Notice that there is NO claim panel when you do this, only the play panel.  Play will cause the city to hang while trying to load.  You must CLAIM first. There are two ways to get around this bug.  1 - When you create the region, claim all cities at that time.  2 - If you did not claim all cities during region creation, then go into the first region and select and claim the second city from the region view.  This works whether you save or don't save your last city.  Again, this is just another small problem with SC.