I was playing on an iPhone 5s running the latest version of the iOS, and the latest version of Fallout Shelter. Suddenly, an event occurred, titled "Room on Fire". However, no room was on fire, and there was actually raiders at my vault door. Also, the Vault Door was never broken down, despite me never upgrading it. So, I'm unable to defeat them, and there are just some raiders at my door that never go away. Closing the game and starting it again fixed it, but it's becoming common now. I've never uninstalled it, and when I first downloaded it, it was already at the latest version.