Status bar icons disappear and then slowly reappear

Question

I have found that the status bar will disappear when swapping the window's root view controller.

1. I have View controller-based status bar appearance set to NO
2. I am swapping between two different view controllers via [UIApplication sharedApplication].delegate.window.rootViewController = rootVC;

Immediately upon displaying the new rootVC the status bar icons all disappear and slowly (10 seconds) begin to reappear. During this time the UI is responsive otherwise. I am not otherwise setting the visibility of the status bar via any method that I know to set the status bar visibility. Neither the old or the new rootVC are displayed as a modal.

Answer 1

So I found that if I changed the View controller-based status bar appearance plist property to YES and called [self setNeedsStatusBarAppearanceUpdate] from the new rootVC the statusbar icons didn't change.