How to reproduce:
1. Open the "IN_38621" project
2. Press File -> Build Settings -> Build
3. In the build folder open the "Il2CppOutputProject\Source\Assembly-CSharp.cpp" script
Expected result: blittable classes are pinned and passed directly to the native code
Actual result: generated code creates a marshalled object on the stack and passes a pointer to the native code
Reproducible with: 2021.3.16f1, 2021.3.24f1, 2022.2.17f1, 2023.1.0b13, 2023.2.0a12
Not reproducible with: 2020.3.47f1, 2021.3.15f1
Testing environment: Windows 10 Pro
Notes:
- Also reproducible on Android
- Not reproducible on WebGL