Doorways between rooms keep disappearing
I've had this happen before between other rooms, currently it's happening with my stylish hall. There should be two doorways at the end of the hall going into two different rooms. But usually when I leave the game and come back, the doorways close up. I have to pick the room up and set it back down in order to make the doorways come back, but then they are gone again the next time I log in. I'm playing Halloween Edition currently, but this was happening in the latest regular edition as well. I am on an iPhone 3GS.
Here's how it's supposed to look:
But here's what keeps happening: