How to reproduce:
1. Open user-supplied project
2. Make sure that 'Test' scene is selected to be built, Scripting runtime is set to .NET 4.6 and scripting backend is set to IL2CPP
3. Build and push APK to device
4. Turn on internet connectivity (Wi-Fi or Mobile data)
5. Run application (socket connection is established successfully)
6. Turn off internet connectivity
7. Press "Reconnect" button
8. Observe that the application crashes

Reproducible with:
0152 - Google Pixel 2*, OS:8.0.0, CPU:arm64-v8a, GPU:Adreno (TM) 540
0157 - Samsung SM N950U1*, OS:7.1.1, CPU:arm64-v8a, GPU:Adreno (TM) 540
0089 - Samsung SM G928F*, OS:7.0, CPU:arm64-v8a, GPU:Mali-T760
OnePlus ONEPLUS A3003*, OS:8.0.0, CPU:arm64-v8a, GPU:Adreno (TM) 530

Not reproducible with:
Acer A1 840FHD (Iconia Tab 8)*, OS:4.4.2, CPU:x86, GPU:Intel/BayTrail

Reproducible with Unity versions: 2018.1.0b3, 2017.2.1p2, 2017.2.0b11, 2017.2.0b6, 2017.2.0b3, 2017.2.0b2,
Not reproducible with: 2017.2.0b1, 2017.1.3f1

Note:
0157 - Samsung SM N950U1*, OS:7.1.1, CPU:arm64-v8a, GPU:Adreno (TM) 540
Crashes on 2017.2.0b1, 2017.1.3f1 whereas other devices don't