Under certain circumstances light probes baked with PVR as backend will generate different results after a light has been disabled/enabled

Repro:

1. Open the attached project
2. Clear the GI cache
3. Open the lighting Window
4. Select Clear Baked Data
5. Click Generate Lighting
6. Observe when baking completes, light probes are white
7. Disable the directional light in the inspector
8. Click Generate Lighting
9. Observe the Light probes are now Blue
10. Re-enable the directional light
11. Click Generate Lighting
12. Observe the light probes remain blue (they stay like this until baking is cleared)