To reproduce:
1. Open attached project;
2. Open scene BugReport;
3. Choose GameObject Loader and press Play button.
4. Notice that right sphere doesn't have texture like the left one.

Expected result: Both spheres should have same texture.
Actual result: The sphere with custom shader loses its normalmap.

Reproduced in: 5.6.2p3; 2017.1.1p3; 2017.2.0f2

NOTE: In 5.5.4p5 and 2017.3.0b2 error "D3D shader blob is empty" is thrown.