How to reproduce:
1. Create a new project
2. Enable Project Settings -> Player -> Optimized Frame Pacing
3. Build and run on Android 4.4 device

Result: application crashes.

Reproducible with: 2019.4.28f1, 2020.1.0a5, 2020.1.9f1, 2020.2.0b7, 2021.1.0a1
Not reproducible with: 2020.1.0a4
Can't test: 2018.4 ("Optimized Frame Pacing" feature does not exist)

Reproducible with:
VLNQA00030, Lge LG G2, Android: 4.4.2, CPU: Snapdragon 800 MSM8974, GPU: Adreno (TM) 330

Not reproducible with:
VLNQA00277, Asus ROG Phone, Android: 8.1.0, CPU: Snapdragon 845 SDM845, GPU: Adreno (TM) 630
VLNQA00121, Samsung Galaxy S9, Android: 9, CPU: Exynos 9 Series 9810, GPU: Mali-G72
VLNQA00042, Lge LG G3 (LG-D855), Android 5.0, CPU: Snapdragon 801 MSM8974AC, GPU: Adreno (TM) 330
VLNQA00334, Xiaomi Mi A3 (Mi A3), Android 10, CPU: Snapdragon 665 SM6125, GPU: Adreno (TM) 610
VLNQA00096, Samsung Galaxy S8 (SM-G950F), Android 8.0.0, CPU: Exynos 9 Octa 8895, GPU: Mali-G71
VLNQA00229, Oneplus OnePlus6T (ONEPLUS A6013), Android 9, CPU: Snapdragon 845 SDM845, GPU: Adreno (TM) 630
VLNQA00054, Xiaomi MI 4LTE (MI 4LTE), Android 6.0.1, CPU: Snapdragon 801 MSM8974AC, GPU: Adreno (TM) 330
VLNQA00032, Motorola Moto X (2nd Gen) (XT1092), Android 5.1, CPU: Snapdragon 801, GPU: MSM8974ACAdreno (TM) 330

Stacktrace:
E/CRASH (13465): signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x4
E/CRASH (13465): Cause: null pointer dereference
[...]
E/CRASH (13465): backtrace:
E/CRASH (13465): #00 pc 0006f46a /system/lib/libdvm.so (dvmGetVirtualizedMethod(ClassObject
E/CRASH (13465): #02 pc 00303b3c /data/app-lib/com.CompanyName.EnablingOptimizedFramePacing-

Notes:
-Full Stacktrace in "Logcat.txt"