How to reproduce it:
1. Open the attached project "EmptyProject.zip"
2. Build and Run it on Android
3. Observe the app that runs on Android

Expected result: App doesn't crash
Actual result: App crashes

Reproducible with: 2018.4.35f1, 2019.4.28f1, 2020.3.10f1, 2021.1.10f1, 2021.2.0a19

Reproducible devices:
VLNQA00122, Samsung Galaxy S9 (SM-G960F), Android 10, CPU: NOT FOUND, GPU: Mali-G72
VLNQA00331, Huawei P20 lite (ANE-LX1), Android 9, CPU: HiSilicon Kirin 659, GPU: Mali-T830
VLNQA00321, Xiaomi MI 9 (MI 9), Android 10, CPU: Snapdragon 855 SM8150, GPU: Adreno (TM) 640
VLNQA00038, Htc Desire 510 (HTC Desire 510), Android 4.4.3, CPU: Snapdragon 410 MSM8916, GPU: Adreno (TM) 306
VLNQA00285, Samsung Galaxy J4 Core (SM-J410F), Android 8.1.0, CPU: Snapdragon 425 MSM8917, GPU: Adreno (TM) 308

Notes:
- Doesn't reproduce with Mono Scripting Backend
- Not reproducible after building and running on macOS
- Not reproducible when "[MonoPInvokeCallback(typeof(MainDelegateFunction))]" is commented in the "DebugMarshalPointers.cs" file

Code that causes the crash:

[Preserve]
[MonoPInvokeCallback(typeof(MainDelegateFunction))]
public static void OnRequestComplete(int status)
{
Debug.LogError("OnRequestComplete " + status);
}