Reproduction steps:
1. Make sure Vuforia module is installed.
2. Create a new project.
3. Import the attached package " 979615_Package".
4. Build the "3-ImageTargets" scene to Xcode project.
5. Build the Xcode project 2 times in a row to a device.

Actual behavior:
- View will not fill the entire screen.
- It may be difficult to see using black devices.
To check it, go to: 'Window' > 'Devices and Simulators' > Select the connected device > 'Take Screenshot'.
A black frame should be visible on the screenshot edges (Screenshot attached).
- If it still doesn't reproduce, minimise and maximise the application a few times.

Expected behavior:
- View fils the entire screen.

Reproduced with:
- iPhone 8 iOS 11.0.1
- 2017.3.0p1

Not reproducible with:
- iPhone 7 iOS 11.1, iPhone 7 iOS 10.3.2

Notes:
- 2017.1 doesn’t have the XR settings,
- Vuforia example doesn’t build with 2017.2, 2018.1 and 2018.2