How to reproduce:
1. Open the attached project "untamed-profile-gfx-2018-4.zip" from case 1222366
2. Open "Edit > Project Settings > Player > Android > Other Settings"
3. Disable "Auto Graphics API"
4. Add "Vulkan" to the Graphics APIs and remove all other entries from the list
5. Build the game on a device with Mali-T760 GPU renderer

Expected Behaviour: No flickering
Actaul Behaviour: Screen flickers occasionaly

Reproducible with: 2018.4.18f1
Not reproducible with(fixed): 2019.3, 2020.1
Could not test with: 2017.4 due to missing packages

Deviced reproduced with:
VLNQA00012, Samsung Galaxy S6 (SM-G920F), Android 7.0, CPU: Exynos 7 Octa 7420, GPU: Mali-T760
VLNQA00286, Meizu - (PRO 5), Android 7.0, CPU: Exynos 7 Octa 7420, GPU: Mali-T760 [this device doesn't support Vulkan!]

Devices not reproduced with:
VLNQA00277, Asus ROG Phone (ASUS_Z01QD), Android 8.1.0, CPU: Snapdragon 845 SDM845, GPU: Adreno (TM) 630
VLNQA00006, Samsung Galaxy S7 (SM-G930F), Android 8.0.0, CPU: Exynos 8 Octa 8890, GPU: Mali-T880
VLNQA00090, Samsung Galaxy S8 (SM-G950U), Android 7.0, CPU: Snapdragon 835 MSM8998, GPU: Adreno (TM) 540
VLNQA00288, Samsung Galaxy J7 (SM-J730F), Android 8.1.0, CPU: Exynos 7 Octa 7870, GPU: Mali-T830
VLNQA00122, Samsung Galaxy S9 (SM-G960F), Android 9, CPU: Exynos 9 Series 9810, GPU: Mali-G72
VLNQA00219, Samsung Galaxy Note9 (SM-N960U), Android 8.1.0, CPU: Snapdragon 845 SDM845, GPU: Adreno (TM) 630
VLNQA00122, Samsung Galaxy S9 (SM-G960F), Android 9, CPU: Exynos 9 Series 9810, GPU: Mali-G72

Note: If the issue does not reproduce try tapping on the screen