Steps to reproduce a bug:
1. Open the attached project TestCase.zip;
2. Open the "_DeferredCustomLights" scene;
3. Press on the Reflection probe;
4. Observe the Reflection probe image in the Inspector.

Expected result: Lights that are created with Command buffers are visible on the Reflection probe like the usual lights.
Actual result: The reflection probe does not render the Command buffered lights.

Reproduced with: 5.3.5p5, 5.4.1f1, 5.5.0b9 versions of Unity.
Note: the Point light in the project is created manually and other lights are created by the Command Buffer.
Also, I have attached the screenshot of the Reflection probe reflected the image.

Fixed on: latest 5.6 patch release.