Reproduction steps:
1. Create a new project.
2. Build and run it to iOS device.
3. Rotate a device to initiate auto rotation (Repeat 5 to 10 times).
- The screen will blink with a black frame.
- Reproduced on 11/33 tries.

Reproduced with:
2017.2.0f2, 2017.3.0a1, 2017.3.0b3
iPad Air 2 iOS 9.2 [Metal]
iPad Mini 4 iOS 11.0 [Metal]
iPhone 6 Plus 8.0 [Metal]
iPod Touch 6 iOS 10.2.1 [Metal]

Not reproducible with:
2017.2.0a1
OR
iPod Touch 6 iOS 10.2.1 [GLES2, GLES3]
iPhone 5C iOS 9.3.2 [GLES2]

Note:
May be related to case 953524