How to reproduce
1. Open attached project
2. Enter playmode
3. Open profiler and select 'Rendering' tab
4. Inspect amount of Draw Calls

Expected behaviour: All objects batched into one draw call resulting in 3~4 drawcalls (objects, skybox, shadows etc)
Actual behaviour: All objects are drawn individually, resulting in over 1000 draw calls

Reproduced on: 5.4.5p4, 5.4.6f3
Not reproduced on: Unity 5.5+