How to reproduce:
1. Open user's attached 'URP_Template.zip' project
2. Go to File-> Build Settings-> Switch to iOS Platform
3. Build for iOS and deploy the Xcode project to the iOS device
4. Press gear icon in the top-left corner of the screen
5. Press 'High' in 'Quality' settings
6. Pan the viewport camera

Expected result: Scene is rendered as presented in Editor
Actual result: Opaque GameObjects and Skybox are rendered black

Reproducible with: 7.3.1(2019.3.15f1), 8.1.0(2020.1.0b10, 2020.2.0a12)
Not reproducible with: 7.1.8, 7.2.1(2019.3.0f6)
Could not test: 2018.4.23f1 due to errors thrown in the Console

Reproducible with:
- iPad Air 2 (iOS 11.0.3)
- iPad Air 1 (iOS 12.4.4) (user's info)
- iPad Air 2 (iOS 13.1) (user's info)

Not reproducible with:
- iPhone 8 Plus (iOS 12.0)
- iPhone XR (iOS 13.4.1)
- iPad Pro 12.9 (iOS 13.4.1)
- Lge Nexus 5X (Nexus 5X), Android 8.0.0, CPU: Snapdragon 808, GPU: Adreno (TM) 418
- Motorola Moto G (5) Plus (Moto G (4)), Android 7.0, CPU: Snapdragon 617 MSM8952, GPU: Adreno (TM) 405
- Xiaomi MI MAX (MI MAX), Android 7.0, CPU: Snapdragon 617 MSM8952, GPU: Adreno (TM) 510
- Xiaomi MI 4LTE (MI 4LTE), Android 6.0.1, CPU: Snapdragon 801 MSM8974AC, GPU: Adreno (TM) 330
- Xiaomi - (Redmi Note 8 Pro), Android 9, CPU: MediaTek Helios G90T MT6785T, GPU: Mali-G76 MC4
- Mac Standalone

Notes:
- Reproducible with Metal; Not reproducible with OpenGL ES2, OpenGL ES3, Vulkan
- Reproducible with opaque materials only
- Screenshots of the issue are attached in Edit