Reproduction Steps:
1. Open User's project
2. Build for iOS
3. Add Camera Privacy
4. Build and deploy to iOS device
5. Press GUI button
Note: It helps if device is held in Horizontally (Landscape position)
6. Notice that Camera Rect is positioned incorrectly

Expected behaviour: Camera rect is positioned correctly.
Actual result: Camera rect is positioned in landscape orientation the they it should be positioned in portrait orientation.

NOTE: This bug reproduces with only some of the devices. Tested on 8 devices and only one of them reproduced the issue.

Reproduced on versions: Unity 5.3.6p8, 5.5.1p3, 5.6.0b7
(Might be because of the small chance of reproduction) Could not reproduce on: Unity 5.4.4p3

Reproduced on device: iPhone 6 iOS 10.2.1