To reproduce:
1. Create a new project using Lightweight Render Pipeline Template (Open Unity Hub > Click "New" > change template to Lightweight RP);
2. Switch platform to Android;
3. Set Graphics API to OpenGLES2;
4. Set Color Space to Gamma;
5. Build and run on Android devices with Mali GPU.

Expected result: The scene is rendered correctly, no visual artifacts.
Actual result: Scene has a distorted shading when using Color Grading effect.

Note: Reproduces without HDR, MSAA and Anti-aliasing (in Post Processing Layer settings).

Reproduces with: 2018.3.7f1, 2019.1.0b4, 2019.2.0a6.

Devices under testing:
Reproduces with:
VLNQA00175, Samsung (SM-N960F), 8.1.0, CPU: Exynos 9 Series 9810, GPU: Mali-G72
VLNQA00224, Samsung Galaxy A5(2017) (SM-A520F), 8.0.0, CPU: Exynos 7 Octa 7880, GPU: Mali-T830
VLNQA00166, Huawei P20 (EML-L29), , CPU: NOT FOUND, GPU: Mali-G72

Does not reproduce with:
VLNQA00110, Samsung Galaxy Note2 (GT-N7100), 4.4.2, CPU: Exynos 4 Quad 4412, GPU: Mali-400 MP (this device has other issues)
VLNQA00023, Xiaomi Mi 4i (Mi 4i), 5.0.2, CPU: Snapdragon 410 MSM8916, GPU: Adreno (TM) 405
VLNQA00111, Samsung Galaxy J5(2016) (SM-J510FN), 7.1.1, CPU: Snapdragon 410 MSM8916, GPU: Adreno (TM) 306
VLNQA00010, Samsung Galaxy S8 (SM-G950U), 7.0, CPU: Snapdragon 835 MSM8998, GPU: Adreno (TM) 540