Reproduction steps:
1. Download the project from the Google Drive link
2. In the Quality settings set the Antialiasing to 2x, 4x or 8x
3. Build for Android
4. Observe the FPS fluctuations in the top right corner

Expected result: FPS does not fluctuate and is steady at 60 FPS
Actual result: FPS fluctuates from 40-60

Reproduces on: 2021.1.0a8, 2021.1.17f1, 2021.2.0b9, 2022.1.0a5
Does not reproduce on: 2019.4.29f1, 2020.3.15f1, 2021.1.0a7

Reproducible with these devices:
VLNQA00381, Xiaomi Redmi Note 8 Pro (Redmi Note 8 Pro), Android 9, CPU: MediaTek Helios G90T MT6785T, GPU: Mali-G76 MC4
N/A, Samsung Galaxy S9 (SM-G960F), Android 8.0.0, CPU: Exynos 9 Series 9810, GPU: Mali-G72
VLNQA00231, Huawei HUAWEI Mate 20 Pro (LYA-L29), Android 9, CPU: HiSilicon Kirin 980, GPU: Mali-G76
VLNQA00335, Samsung Galaxy S20+ 5G (SM-G986B), Android 10, CPU: Exynos 990, GPU: Mali-G77

Not reproducible with these devices:
VLNQA00002, Samsung S5 Neo LTE (SM-G903F), Android 6.0.1, CPU: Exynos 7 Octa 7580, GPU: Mali-T720
VLNQA00318, Oneplus 7Pro (GM1913), Android 10, CPU: Snapdragon 855 SM8150, GPU: Adreno (TM) 640
VLNQA00286, Meizu Pro 5 (PRO 5), Android 7.0, CPU: Exynos 7 Octa 7420, GPU: Mali-T760
VLNQA00313, Huawei Y6 Ⅱ Compact (HUAWEI LYO-L01), Android 5.1, CPU: MediaTek MT6735, GPU: Mali-T720
VLNQA00294, Oppo OPPO Reno Z (PCDM10), Android 11, CPU: NOT FOUND, GPU: PowerVR Rogue GM9446

Notes:
-Issue does not reproduce on OpenGLES 3 and OpenGLES 2
-Issue reproduces with all Antialiasing options
-Issue reproduces regardless if Vsync is on or off