Imported Asset Bundles do not import correctly

To reproduce:
1. Open attached project
2. Build and run on an Android Device.
3. Click WebRequest button (it only works in horizontal view)
Expected result: A Character is loaded
Actual result:
In 2018.1.0b2, the whole screen changes colour into Red or Black.
In 2017.3.0p1, 2017.3.0a1, the character would appear with a Red or Black texture (colours are same between devices).
In 2017.2.1f1 and 2017.1 the character is imported and shown correctly

Reproduced in: 2018.1b1 limited reproduction in 2017.3

Devices under test:
armeabi-v7a NVIDIA Tegra 1200x1920 7.0 Nvidia SHIELD Tablet K1*
armeabi-v7a Adreno (TM) 320 1080x1920 5.0.1 Samsung GT I9505*
arm64-v8a Mali-G71 1440x2960 7.0 Samsung SM G950F*