Steps to reproduce:
1) Open the attached project (951115_SBSAR.zip).
- Note: the project doesn't compile when it is opened for the first time, close Unity and repeat step 1. The project works fine afterwards.
2) Build for Android or iOS.
3) Run on a device.

After the splash screen ends, a white ball is shown on the screen. When the project is run on the editor, the ball has a gun and a belt around it. This happens because these objects utilize Skinned Mesh Renderers with procedural sbsar materials, which are not rendered.
This occurs with OpenGL ES as well as Vulkan and Metal.
Using maximum Quality Settings and same Graphics options as on the editor doesn't fix the issue.

Reproduced on:
2018.1.0a3 (f8847412a9cd - trunk as of 2/11/2017), 2017.1.1f1 5.6.0b4

Devices tested:
Samsung Galaxy S7 Android 7.0
iPad Mini 2 iOS 10.3.1