Board Thread:General Discussion/@comment-5039776-20130105001157/@comment-5051663-20130114084708

If you have to do this repeatedly, you might be running out of space on your device. Installing the game takes a certain amount of space. As you run the game, it adds more control files and images cached. It never deletes any of them, although many of them are obsolete. An uninstall/reinstall reduces the files to those needed to display your village *NOW*, then more gradually accumulate. A more permanent fix might be to uninstall something else.

You might be able to check how much memory you've got left from your phone/tablet.