CNContactPickerViewController is affected by UINavigationBar.Appearance in ios 11 - ios11

Is this by design ?
The app, I am working on has a black background navigation bar and white text, set using UINavigationBar.Appearance BarStyle / BarTintColor / TintColor
On iOS 10 all is good: when a CNContactPickerViewController is presented, its ui has a white background. On ios 11 it has a black navigation bar. The problem is the UISearchBar: it displays black text over a black background....

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