To reproduce:
1. Open attached project
2. Go into Build settings
3. Set Texture Compression to ETC (Default)
4. Build and run to Android device

Actual result: Textures are not being displayed when Compress using ETC1(split alpha channel) is checked.
Expected result: Textures should be displayed when Compress using ETC1(split alpha channel) is checked.

Tested with: VLNQA00136, Samsung Galaxy S9+ (SM-G965F), 8.0.0, CPU: Exynos 9 Series 9810, GPU: Mali-G72

Reproduced with: 2018.1.9f1; 2018.2.0f2; 2018.2.2f1; 2018.3.0a8

Note: Unchecking Compress using ETC1(split alpha channel) for Test1 image, textures in the build are being shown.