I have two UIViewController in my app: main, and player.
In main, the status bar shows. Then main presents player, and in player the status bar is hidden, using modalPresentationStyle of Full Screen. When I dismiss player, main is shown and the status bar returns.
After upgrading my app to iOS 11, when dismissing player, the status bar does not return.
View controller-based status bar appearance is set to NO in my info.plist file.