PostProcessScene called twice during a build

To reproduce:
1. Open attached project
2. Open bugdemo scene
3. Enter play mode. You get one debug.log of PPS called LightXXX the script creates a game object with this name. In play mode, the object lists it's name.
4.Build the player.

Expected result: PostProcessScene is executed once
Actual result: Notice you have 2 "PPS called …" indicating that PostProcessScene is executed twice.

Notes: Run the built player, check out the player log.You can notice that only the second object was inserted in the scene.
This seems to indicate that the PostProcessScene is called the first time, and the results are then thrown out.