To reproduce:
1. Open attached project "repro.zip"
2. Build for iOS
3. On iOS device go to Settings > Display & Brightness > View > Zoomed
4. Open build with Xcode to iOS device
5. In the Xcode logs observe as the SafeArea is bigger than screen width and height

Expected result: SafeArea is smaller or the same size as Screen width or height
Actual result: SafeArea is bigger than screen size

Reproduced on:
2017.3.0p2 2017.2.3p1 2017.3.2f1 2017.4.5f1 2018.1.4f1 2018.2.0b7 2018.3.0a1

Not reproduced on:
2017.2.3p1 2017.3.0p1

iPhone 6 iOS 11.3.1

Everything works as expected in standard view.