Steps to reproduce:

1. Open attached project
2. Open scene "/Scenes/Bug"
3. Expand "Directional Light" in the hierarchy and notice that it parents "Main Camera"
4. Run scene and notice that "Main Camera" is no longer visible in the hierarchy, but the game view is still rendered, which means that "Main Camera" doesn't get destroyed

Note: Bug.cs sets parent of "Main Camera" to null in Awake(). If we did the same in Start() then this bug wouldn't be present.

Workaround: Change parent in Start()