Reproduction steps:
1. Open the attached project.
2. Switch to an iOS platform.
3. Build and run it on an iOS device.

Actual behavior:
- After the splash screen animation finishes, observe that the camera's skybox is briefly shown. The canvas shows up only after a second.

Expected behavior:
- The canvas shows up instantly after the splash screen.

Reproduced with:
2018.3.0a9, 2018.2.4f1
iPhone 6 iOS 10.3.3, iPhone 7+ iOS 11.1.1, iPod Touch 6 iOS 10.2.1

Not reproducible with:
2018.1.9f1
or
Android (Google Pixel 2 XL)
or
macOS Standalone