Reproduction steps:
1. Open the user's attached project "AndroidVulkanUpdateExternalTextureRepro.zip"
2. Make sure Graphics API is set to Vulkan
3. Build and Run on an Android device
4. Select the red cube

Expected result: The cube changes the color from red to green
Actual result: The cube does not change the color from red to green (stays red)

Reproducible with: 2020.3.24f1, 2021.2.5f1, 2022.1.0a8
Not reproducible with: 2022.1.0a9
Could not test with: 2019.4.33f1 (Package errors when downgraded)

Reproducible with these devices:
----------, Samsung - (SM-G991U), Android 11, CPU: Snapdragon 888, GPU: Adreno (TM) 660
VLNQA00335, Samsung Galaxy S20+ 5G (SM-G986B), Android 10, CPU: Exynos 990, GPU: Mali-G77
----------, Huawei - (ELS-NX9), Android 10, CPU: NOT FOUND, GPU: Mali-G76
VLNQA00264, Samsung Galaxy S10+ (SM-G975F), Android 10, CPU: NOT FOUND, GPU: Mali-G76

Not reproducible with these devices:
VLNQA00288, Samsung Galaxy J7 (SM-J730F), Android 8.1.0, CPU: Exynos 7 Octa 7870, GPU: Mali-T830
N/A, Huawei - (NOH-NX9), Android 10, CPU: NOT FOUND, GPU: Mali-G78
VLNQA00316, Samsung Galaxy Note10 (SM-N970F), Android 9, CPU: Exynos 9 Series 9825, GPU: Mali-G76
VLNQA00001, Google Pixel 2 (Pixel 2), Android 11, CPU: Snapdragon 835 MSM8998, GPU: Adreno (TM) 540
VLNQA00225, Qualcomm null (SDM845 for arm64), Android 8.1.0, CPU: Snapdragon 845 SDM845, GPU: Adreno (TM) 630
N/A, Huawei - (NOH-NX9), Android 10, CPU: NOT FOUND, GPU: Mali-G78
iPhone 13 mini (iOS 15)
iPhone 8 Plus (iOS 14.4.2)
iPad Air 2 (iOS 11.0.3)

Could not test with:
VLNQA00313, Huawei Y6 Ⅱ Compact (HUAWEI LYO-L01), Android 5.1, CPU: MediaTek MT6735, GPU: Mali-T720 (Project doesn't open)
VLNQA00078, Motorola Nexus 6 (Nexus 6), Android 7.1.1, CPU: Snapdragon 805 APQ8084AB, GPU: Adreno (TM) 420 (Project doesn't open)
VLNQA00391, Xiaomi Redmi 9A (M2006C3LG), Android 10, CPU: MediaTek Helio G25 (MT6762G), GPU: PowerVR Rogue GE8320 (The cube is white and does not change colors)
----------, Oppo Reno Z 中国版 (PCDM10), Android 11, CPU: NOT FOUND, GPU: PowerVR Rogue GM9446 (The cube is white and does not change colors)

Notes:
-The issue is not reproduced in the Editor
-The issue is not reproduced with OpenGLES
-The issue is not reproduced on IOS devices