Steps to repro:

1. Open attached project and '04_AutomaticInstancingSubmeshes' scene;
2. Build and run the scene under Vulkan graphics API.

Expected result:
All meshes are rendered (see expected.png screenshot).

Actual result:
Some meshes are rendered partially (without color). See attached actual.png screenshot.

Regression introduced in 2017.3.0.

Notes:
- Reproducible in 2017.3.0a7;
- Not reproducible in 2017.2.0b11, 2017.1.0p4;
- Reproducible only for Vulkan; not reproducible for DX11;
- Reprodicible only on Windows; not reproducible on OSX;
- Reproducible only in Standalone Player; not reproducible in Editor;
- Reproducible only for meshes with material having Surface Instanced Shader, not reproducible with newly created surface shader.