The RectTransform Position and Width properties remain inaccessible after removal of LayoutElement and VerticalLayoutGroup components

To reproduce:

1. Download attached project "TestBed.zip" and open in Unity
2. Open "SampleScene" scene
3. Select and expand the "Canvas" in Hierarchy window
4. Select "Group" gameObject
5. Remove the "VerticalLayoutGroup" component
6. Expand "Group" gameObject
7. Remove the "LayoutElement" component

Expected results: The RectTransform Position and Width properties on the Element gameObject becomes accessible in the Inspector
Actual results: The RectTransform Position and Width properties on the Element gameObject remain inaccessible in the Inspector

Notes:
- This issue reproduces on both Windows and OSX
- Reloading the scene reinstates access to the properties

Reproduced on Unity 2018.2.0a2, 2018.2.1f2 and 2018.3.0a5
Could not reproduce on Unity 2018.1.9f1 and 2018.2.0a1
Regression on Unity 2018.2.0a2