When a scene is returned with SceneManager.GetSceneByName, its properties (Scene.name and Scene.isValid) return foul values.

Steps to reproduce:
1) Open the attached project (835102_Scene.zip).
2) Open scene 'Test1'.
3) Press play.

SceneManager.GetSceneByName is used to find a scene. The scene if found, however, when trying to access its name, 'Null' is returned, Scene.isValid returns 'false' as well, even though the scene can be loaded using SceneManager.LoadScene. This does not occur when returning a currently active scene.

Reproduced on:
5.5.0b5, 5.4.1p3, 5.3.6p6