Background thread runs a few times slower when “application.targetFrameRate“ is set to 30 compared to 29 on some iOS devices

How to reproduce:
1. Build And Run the attached “project.zip” project on iOS device
2. Observe the logs

Expected result: The logged time is ~0.2s
Actual result: The logged time is ~0.2s for a few seconds and then ~1s

Reproducible with: 2021.3.33f1, 2022.3.15f1, 2023.2.4f1, 2023.3.0a18

Reproduced on:
VLNQA00310 - iPad Pro 12.9", 13.4.1 iOS
VLNQA00382 - iPhone 7, 13.1 iOS

Not reproducible on:
VLNQA00494 - iPhone 14 Pro Max, 16.3.1 iOS
VLNQA00358 - iPhone 12, 14.1 iOS
VLNQA00392 - iPad (9th generation), 15.0 iOS
VLNQA00120, Google Pixel 2 (Pixel 2), Android 8.1.0, CPU: Snapdragon 835 MSM8998, GPU: Adreno (TM) 540
VLNQA00267, Samsung Galaxy S10+ (SM-G975F), Android 12, CPU: Exynos 9 (9820), GPU: Mali-G76
VLNQA00178, Xiaomi Redmi Note 4 (Redmi Note 4), Android 6.0, CPU: MediaTek Helio X20 MT6797M, GPU: Mali-T880
VLNQA00489, Htc 10 (HTC 10), Android 6.0.1, CPU: Snapdragon 820 MSM8996, GPU: Adreno (TM) 530

Notes:

• reproducible with devices with A8x and A10 chips (user’s info)
• not reproducible when “application.targetFrameRate” is set to 29