When a prefab of a gameobject is created and its Tag or Layer is changed then Inspector window flickers, Refer attached video

Steps to repro:
1. Create a new project.
2. Create a Prefab of Camera
3. Project window > Prefab of Camera
4. Inspector > Tag/Layer > Select any Tag or Layer from the dropdown

Actual Result:
Inspector window flickers on changing Tag or Layer of a Prefab

Expected Result:
Tags and Layers of Prefab are changed gracefully

Occurring in:
2020.2.0a9, 2020.1.0b8, 2020.1.0a1, 2019.3.0b1,2019.3.0a1,2019.2.18f1, 2019.1.14f1, 2018.4.19f1

Environment:
Windows 10 & macOS 10.15