When the orientation of the screen is changed via a script (with Screen.orientation) on iOS 10 devices, sometimes the screen remains in portrait orientation, but the game view gets flipped and goes over the edge of the screen and leaves black area in the bottom part of the screen.

Steps to reproduce:
1) Open the attached project.
2) Build 'MainScene' for iOS.
3) Run on an iOS 10 device.
4) Press the 'Switch to landscape' UI button.

If the button is clicked 2-3 seconds after launch - the rotation should fail - black area appears at the bottom of the screen, half of the game view is not visible. If it does not, quit the app completely, re-launch it and repeat step 5). This occurs with both Metal and OpenGLES on iOS 10.

Reproduced on:
5.5.0b5, 5.4.1p3, 5.3.6p6

Devices:
iPhone 7 iOS 10 - reproduced
iPhone 7 iOS 10.1 - reproduced
iPhone 7 Plus iOS 10.0.2 - reproduced
iPhone 5 iOS 10 - not reproduced
iPad Mini 2 iOS 10 - not reproduced
iPhone 5S iOS 9.2.1 - not reproduced
It should also be reproducible on iPhone 6.
iPhone 6S iOS 10.2 - reproducible

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Fixed in 2017.1.0b10, 5.6.2p1, 5.5.4p1, 5.4.5p4