To reproduce:
1. Open attached project "test.zip"
2. Open "scene.unity" scene
3. Build for iOS
4. Deploy Xcode project to iOS device
5. Observe in the top right corner Screen resolution(first line) and Safe area(second line), safe area on Start() is reported bigger than screen resolution

Expected result: Screen.safeArea is shown that same as screen resolution or small on Start()
Actual result: Screen.safeArea reports bigger than the screen resolution on Start()

Reproduced on:
2017.4.12f1 2018.1.9f2 2018.2.11f1 2018.3.0b4 2019.1.0a3

Device reproduced on:
iPhone 7 Plus iOS 12.0

Notes:
Didn't seem to reproduce on:
VLNQA00144, Samsung Galaxy S9 (SM-G960U1), Android 8.0.0, CPU: Snapdragon 845 SDM845, GPU: Adreno (TM) 630