Reproduction steps:
1. Download and open the submitted project "GalaxyExynos-GraphibsJobs-Issue-2020.2.zip"
2. Make sure GraphicsJobs are enabled (Edit -> Project Settings -> Player -> Other Settings)
3. Build and run

Expected result: GameObjects in the scene don't flicker
Actual result: GameObjects in the scene flicker

Reproducible with: 2020.1.15f1, 2020.2.0b13, 2021.1.0a7

Reproduces on:
----------, Samsung Galaxy S9 (SM-G960F), Android 10, CPU: Exynos 9810, GPU: Mali-G72
Galaxy S10+ with Exynos CPU (reported by the user)

Does not reproduce on:
VLNQA00321, Xiaomi MI 9 (MI 9), Android 9, CPU: Snapdragon 855 SM8150, GPU: Adreno (TM) 640
VLNQA00012, Samsung Galaxy S6 (SM-G920F), Android 7.0, CPU: Exynos 7 Octa 7420, GPU: Mali-T760
Galaxy S10+ with Snapdragon CPU (reported by the user)
iPhone 6S (iOS 13.3.1)

Reproduces with graphics APIs: Vulkan

Does not reproduce with graphics APIs: OpenGLES2, OpenGLES3, Metal

Notes:
Disabling GraphicsJobs fixes the issue.
Suspending and then resuming the app would make the screen completely black.
Could not test with Unity 2019.4.15f1 and below due to the build failing.