Steps to reproduce:

1) Download attached project and open in Unity
2) Make sure Graphics API is set to Gles3 and Color space(Android - Linear, iOS - Gamma)
3) Build and Run Sample scene on a device

Note: Only the Skybox is rendered

Reproduced with:
2018.3.0a11, 2018.3.0b4

Not reproduced with:
2018.2.9f1, 2018.3.0a9, 2019.10.a2

Regression since:
2018.3.0a10

Devices under testing:
Reproduced with:
VLNQA00108 Lge LG H340n, OS:5.0.1, CPU:armeabi-v7a, GPU:Adreno (TM) 306
VLNQA00157, iPhone X, A11, iOS 11.4.1
VLNQA00162, iPad Pro 10.5’’, A10X, iOS 11.3

Not reproduced with:
VLNQA00072 Google Pixel C, OS:8.1.0, CPU:arm64-v8a, GPU:NVIDIA Tegra
VLNQA00003 Razer Phone, OS:7.1.1, CPU:arm64-v8a, GPU:Adreno (TM) 540
VLNQA00129 Nvidia SHIELD Tablet, OS:6.0.1, CPU:armeabi-v7a, GPU:NVIDIA Tegra
VLNQA00009 Samsung Galaxy Note8, OS:8.0.0, CPU:arm64-v8a, GPU:Mali-G71

Note: Reproduced using Gles2 with Gamma color space also, but with Gles2, additional device is affected:
VLNQA00003 Razer Phone*, OS:7.1.1, CPU:arm64-v8a, GPU:Adreno (TM) 540

Did not reproduced using PC standalone build