How to reproduce it:
1. Open the user's attached project 'STW 2021.2 MARS 2.zip'
2. Build and Run it on the device
3. Move the phone around to get plane detection

Expected result: Background displays camera view and the plane is detected
Actual result: Background is black, but plane is detected

Reproducible with: 2019.4.29f1, 2020.3.16f1, 2021.1.17f1, 2021.2.0b6, 2021.2.0b6, 2022.1.0a4 (Unity MARS 1.3.1)

Reproducible on:
VLNQA00122, Samsung Galaxy S9 (SM-G960F), Android 10, CPU: Snapdragon 855 SM8150, GPU: Mali-G72
VLNQA00331, Huawei P20 lite (ANE-LX1), Android 9, CPU: HiSilicon Kirin 659, GPU: Mali-T830
VLNQA00321, Xiaomi MI 9 (MI 9), Android 10, CPU: Snapdragon 855 SM8150, GPU: Adreno (TM) 640

Could not reproduce on:
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
VLNQA00042, Lge LG G3 (LG-D855), Android 5, CPU: Snapdragon 801 MSM8974AC, GPU: Adreno (TM) 330
VLNQA00013 - Galaxy S6 Edge+ (SM-G928F), OS: 7.0.0, CPU: Exynos 7 Octa (7420), GPU: Mali-T760
- AR Core is not supported