How to reproduce:
1. Open attached project "MSAA_Test 2.zip"
2. Build and Run on Android
3. When the app loads, select "2x" from dropdown window to enable MSAA
4. Make sure the checkbox is checked (this enables Post Processing)
5. Place device in landscape mode and observe the corner of box in the bottom left corner (this is the easiest place to spot the pixels)

Expected result: The corners are pixelated
Actual result: The corners are smooth without noticeable pixels

Reproducible with: 2019.4.38f1, 2020.3.33f1, 2021.3.0f1, 2022.1.0b16, 2022.2.0a11

Reproducible with:
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

Not reproducible with:
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

Notes:
- Not reproducible with 4xMSAA
- Tools like RenderDoc can also be used to spot the issue