Steps to reproduce:
1. Open the attached project (instancing_test_debug.zip)
2. Open the Assets/test.unity scene
3. Run the scene
4. Open the Profiler
5. In the GPU section you will notice that Camera.Render > Drawing > Camera.RenderSkybox is taking ( in my case ), and the DrawMeshInstanced is nowhere to be seen

Expected result: DrawMeshInstancedIndirect should be registered in the Profiler
Actual result: DrawMeshInstancedIndirect being registered in the Profiler as Camera.RenderSkybox

Note:
Feature is introduced in Unity 5.6

Reproduced with: 5.6.0b1, 5.6.0f1, 5.6.0f2, 2017.1.0a4