Steps to reproduce:
1) Open the attached project (OC link, 1.2GB) (use command line and '-buildTarget Android' argument when launching Unity).
2) Go to Menu > Btd6 > Dump Model and flatten materials and prefabs.
3) Enable and Unity IAP (update version, if needed) & Analytics through Services tab.
4) Build for Android.
5) Run on a device.
- Dismiss the 'PURCHASER.INSTANCE.ISINITIALIZED() == FALSE' prompt by tapping it.
6) Press 'START'.
7) Press 'CLEAR'.
8) Press 'PLAY'.
9) Press 'NEW GAME'.
10) Press 'MONKEY MEADOW'.
11) Press 'MEDIUM'.
12) Press 'STANDARD'.

The app crashes somewhere within libil2cpp.so library.
This does not happen when using Mono backend. The crash doesn't occur on iOS devices, even when using IL2CPP.

Notes:
Steps 2-3 only need to be done once, even if switching versions.
The project is compatible with Unity 2017.1 - 2018.1.
Case 962771 prevents from testing this project on Unity 2017.2 - 2017.3.

Reproduced on:
2018.1.0a7, 2017.1.2p3, 2017.1.0p4

Devices:
Samsung Galaxy S7 Android 7.0
Nexus 6P Android 8.0