How to reproduce:
1. Open the attached project
2. Change Graphics API to GLES3 or GLES2 (Edit -> Project Settings -> Player)
3. Build and run a project on Android
4. Click on 'Scene: 01_WebCamTexture_Test' toggle at the very top to disable the UI overlay
5. Several times switch between Cameras by clicking on 'Camera 0' and 'Camera 1' buttons and observe the results

Expected result: No artifacts
Actual result: Rotated image is shown for a second

Reproducible: 2018.4.7f1, 2019.2.3f1, 2019.3.0b1, 2020.1.0a2

Reproducible with:
VLNQA00013, Samsung Galaxy S6 edge+ (SM-G928F), Android 7.0, CPU: Exynos 7 Octa 7420, GPU: Mali-T760

Not reproducible:
VLNQA00118, Google Pixel 2 XL (Pixel 2 XL), Android 8.1.0, CPU: Snapdragon 835 MSM8998, GPU: Adreno (TM) 540
VLNQA00278, Xiaomi - (Redmi Note 7), Android 9, CPU: Snapdragon 660, GPU: Adreno (TM) 512
VLNQA00137, Samsung Galaxy S9+ (SM-G965F), Android 9, CPU: Exynos 9 Series 9810, GPU: Mali-G72
VLNQA00282, Samsung Galaxy S10e (SM-G970U), Android 9, CPU: Snapdragon 855 SM8150, GPU: Adreno (TM) 640
VLNQA00021, Samsung Galaxy S7 (SM-G930F), Android 7.0, CPU: Exynos 8 Octa 8890, GPU: Mali-T880
35465210338, Samsung Galaxy S10 (SM-G975F), Android 10.0, CPU: Exynos 9820 (ARMv8), GPU: Mali-G76
VLNQA00155, Meizu PRO 7 Plus (PRO 7 Plus), Android 7.0, CPU: MediaTek Helio X30 MT6799, GPU: PowerVR Rogue Marlowe
VLNQA00004, Meizu - (MX5), Android 5.0.1, CPU: MediaTek Helio X10 MT6795T, GPU: PowerVR Rogue G6200
VLNQA00286, Meizu - (PRO 5), Android 7.0, CPU: Exynos 7 Octa 7420, GPU: Mali-T760
VLNQA00233, Meizu - (PRO 6 Plus), Android 7.0.0, CPU: Exynos 8 Octa 8890, GPU: Mali-T880
N/A, LG V50 ThinQ 5G (LMM-V500N), Android 10, CPU: Qualcomm Snapdragon 855 (SM8150), Adreno 640

Notes:
- Not reproducible with Vulkan API