How to reproduce:
1. Open user-submitted project (WrongPingDraw)
2. Open the 'SampleScene'
3. In the Hierarchy window Unfold the GameObjects 'GRAPHIC INSIDE' and its child 'GameObject (7)'
4. Re-position the 'GRAPHIC INSIDE' GameObject in the Hierarchy so that it is visible in the Hierarchy without scrolling, but child of 'GameObject (7)' named 'GRAPHIC' is not
5. Fold the 'GameObject(7)' and 'GRAPHIC INSIDE' GameObjects
6. Unfold the 'GameObject' object to reveal the 'SLIDER' GameObject
7. Select 'SLIDER' and click on its Target Graphic field to mark 'GRAPHIC'

Expected result: 'GRAPHIC' is highlighted at the correct depth
Actual result: 'GRAPHIC' is highlighted at the wrong depth

8. Fold 'GameObject (7)' and 'GRAPHIC INSIDE' GameObjects
9. Re-position 'GRAPHIC INSIDE' so that it is no longer visible from the top of the Hierarchy without scrolling
10. Select 'SLIDER' and click on its Target Graphic field to mark 'GRAPHIC'

Expected result: 'GRAPHIC' is highlighted
Actual result: 'GRAPHIC' is not highlighted

Reproducible with: 2017.4.30f1, 2018.4.5f1, 2019.1.11f1, 2019.2.0b10, 2019.3.0a10