If the prefab root is not displayed in the current hierarchy view, then it is also not displayed when root is selected by right-clicking on of its child. Refer the attached video

Steps to reproduce:
1) Create a new project
2) Import attached "NestedPrefab" package
3) Expand the prefab in hierarchy and scroll down till the root is out of focus
4) Right-click on any child > Prefab > Select Root

Actual result: Prefab root is not displayed in Hierarchy

Expected result: Hierarchy window should be scrolled till the Prefab root is in focus

Occurring on: 2020.2.0a3, 2020.1.0b2, 2019.3.4f1, 2019.2.12f1, 2018.4.12f1

Environment: Both Windows and Mac