To reproduce:

1. Open the project, attached by the user (Text Quest GI.zip)
2. Open the "Castle" scene
3. Enter Play mode
4. Go down the stairs to load another scene
5. In another scene, go back up the stairs to load previous scene
6.Observe the shadow color in the scene

Expected: shadow color doesn't change when the scene is reloaded

Reproduced in 2017.1.1f1, 2017.1.2f1
Did not reproduce in 2017.2.0a1, 2017.2.0f3, 2017.3.0b4
Could not reproduce in 5.6 due to features of the engine used that were introduced in 2017.1

Not reproducible in 2017.2