To reproduce:
1. Open attached project
2. Add all scenes ("firstlevel", "secondlevel", "thirdlevel") to hierarchy
3. Ensure that the active scene is "firstlevel"
4. Observe the green bounce lighting that (correctly) affects both of the small cubes in the center of the room
5. Click Play button

Actual behavior: observe that the green bounce lighting only affects objects in "firstlevel", namely the right cube
Expected behavior: green light should affect both cubes like in the play mode

Workaround: disable "Auto" in the lightmap settings tab