To reproduce:
1. Open attached project "Lighting Test.zip".
2. Open Lighting settings window, and observe that "Scene_1" and "Scene_2" have different Lighting settings.
3. Open "Scene_1", and add "Scene_2" into hierarchy, to have multiple scenes.
4. Set active scene to "Scene_2".

Expected result: Lighting settings should display all settings of the new active scene.
Actual result: After changing active scene, settings of the first scene are shown. (only Realtime and Mixed Lighting settings are shown correctly, of the new Active Scene)

Reproducible: 5.6.0b2, 5.6.2f1, 2017.1.0b10, 2017.2.0a4
Not reproducible: 5.5.4p1, 5.6.0b1

Workaround:
Remove or Unload the 1st scene, to see Lighting settings of a new Active Scene.