When an environment is rotated using a mouse, Rotation Value from "New Environment" doesn't update However when a value is typed into input field of Rotation, environment rotates accordingly, refer the attached video

Steps to repro:
1. Create a new project with HDRP Template
2. Upgrade High Definition RP Package to 7.2.1
3. Window > Render Pipeline > Look Dev
4. Select the "Environment" tab > New Library > Load Library
5. Add new empty environment (+)
6. Drag and drop "environment" into "Look Dev" panel
7. Rotate environment using a mouse

Actual Result:
Rotation value doesn't update when the environment is rotated using a mouse

Expected Result:
Rotation value from "New Environment" is updated when the environment is rotated using a mouse

Note: "Look Dev" window is introduced in Unity 2019.3.0a12

Reproducible in:
2020.1.0a24, 2019.3.2f1, 2019.3.0a12

Package version found: 7.2.1, 7.2.0, 7.1.8, 7.1.7, 7.1.6, 7.1.1, 7.0.0

Environment:
Windows 10 and macOS 10.14