To reproduce:
1. Open users attached project "RemoteCameraPreview.zip"
2. In Edit > Project Settings > Editor set Device to Any iOS Device
3. Connect iOS device to the machine with USB cable
4. Open Unity Remote 5 app on an iOS device
5. In Hierarchy select CameraRenderer game object
6. Make sure that Type is set to Remote
7. Enter play mode
8. Observe as the colors do not match with real-life colors and the camera view has a transparent default scene layer on top of it
9. Exit play mode and select CameraRenderer game object from the hierarchy
10. Set type to Web Cam
11. Enter play mode
12. Observe as the colors are correct and no transparent scene layer is visible

Expected result: using iOS device as a camera with Unity Remote 5 colors shown are correct and no transparent layer is visible
Actual result: colors do not match with real-life colors and the camera view has a transparent default scene layer on top of it

Reproduced on:
5.6.6f2 2017.1.4f1 2018.1.4f1 2018.2.0b8 2018.3.0a1

Device reproduced on:
iPhone 8 iOS 11.0
iPhone 6S iOS 11.0

Only reproduces on Metal Editor Support.
Everything works fine on a windows machine