If you have the main scene view set to 3D but are viewing a prefab in 2D isolation mode, then enter and exit playmode, the grid in the main scene view will stay vertical as if the scene view is still 2D.

1. Install Unity
2. Open the attached project
3. Make sure the Scene view is set to 3D
3. Navigate to Assets > Plugins > IngameDebugConsole > IngameDebugConsole.prefab
4. Open IngameDebugConsole.prefab in isolation mode
5. Set the isolation scene view to 2D
6. Enter play mode
7. Exit play mode

Expected Result:
The user is returned to scene view and the grid should match the 3D view setting.

Actual Result:
The user is returned to scene view, which is set to 3D, but the scene view grid appears vertical as if the scene view is set to 2D.

Tested on Windows.

Occurs on 2019.1.0a14, 2019.1.0a13

Does not occur on 2018.3.0f2, 2019.1.0a7, 2019.1.0a12