steps to reproduce:

1) open the project
2) play scene 'sceneOn'

- observe expected results
Prints: "P publicGO 5 sceneOn sceneOff"
(sceneOn and sceneOff represent public Object that have a scene assigned)

3) build the project and run
- observe actual results
Prints: "P publicGO 5"
When referencing sceneOn it returns null reference.

First three variables that are printed out are there to showcase that:
public Object name (when assigning GameObject)
public GameObject name
*public int name
works as expected