EndLayoutGroup error in the console on saving a scene for the first time which has a NavMesh Baked surface on MacOS

Steps to Reproduce:
1. Create a new Project
2. Hierarchy > 3D Object > Plane ( Or any unity Primitive )
3. Window > AI > Navigation
4. Select plane from Hierarchy and check "Navigation Static" from Navigation
5. Navigation > Bake > Select Bake button
6. Save Scene.

Actual Result:
EndLayoutGroup error thrown in the console after saving the scene.

Expected Result:
The scene is saved without any errors in the console.

Reproducible on:
2019.1.0a14, 2018.3.0f2, 2018.2.0f2, 2018.1.0f2, 2017.3.0f3

Environment:
Only on MacOS

Error Details:
EndLayoutGroup: BeginLayoutGroup must be called first.
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)