How to reproduce it:
1. Open the user's attached project
2. Build and Run it on Android
3. Observe the around the pit at the center of the screen

Expected result: Violet visual artifact doesn't appear near the pit
Actual result: Violet visual artifact appears near the pit

Reproduces on: 7.6.0 (2019.4.28f1), 10.5.0 (2020.3.11f1), 11.0.0 (2021.1.10f1), 12.0.0 (2021.2.0a19)
Could not test with: 2018.4 - URP was not introduced yet

Reproduced on these devices:
VLNQA00321, Xiaomi MI 9 (MI 9), Android 10, CPU: Snapdragon 855 SM8150, GPU: Adreno (TM) 640
VLNQA00022, Xiaomi Redmi Note 3 (Redmi Note 3), Android 6.0.1, CPU: Snapdragon 617 MSM8952, GPU: Adreno (TM) 510

Not reproduced on these devices:
VLNQA00122, Samsung Galaxy S9 (SM-G960F), Android 10, CPU: NOT FOUND, GPU: Mali-G72
VLNQA00331, Huawei P20 lite (ANE-LX1), Android 9, CPU: HiSilicon Kirin 659, GPU: Mali-T830
VLNQA00038, Htc Desire 510 (HTC Desire 510), Android 4.4.3, CPU: Snapdragon 410 MSM8916, GPU: Adreno (TM) 306
VLNQA00285, Samsung Galaxy J4 Core (SM-J410F), Android 8.1.0, CPU: Snapdragon 425 MSM8917, GPU: Adreno (TM) 308
VLNQA00288, Samsung Galaxy J7 (SM-J730F), Android 8.1.0, CPU: Exynos 7 Octa 7870, GPU: Mali-T830
Google Pixel 3 XL (Pixel 3 XL), Android 11, CPU: Snapdragon 845, GPU: Adreno (TM) 630
Huawei - (NOH-NX9), Android 10, CPU: NOT FOUND, GPU: Mali-G78
VLNQA00001, Google Pixel 2 (Pixel 2), Android 11, CPU: Snapdragon 835 MSM8998, GPU: Adreno (TM) 540
VLNQA00316, Samsung Galaxy Note10 (SM-N970F), Android 9, CPU: Exynos 9 Series 9825, GPU: Mali-G7

Notes:
- Reproducible with Graphics APIs: Vulkan, OpenGLES2, OpenGLES3
- Not reproducible on macOS