Double-clicking a scene file in explorer from another project no longer closes the current project and opens a new project with scene loaded also "About to open another project!" pop up doesn't appear

Steps to reproduce:
1. Create a new project
2. Double click unity scene from another project in file explorer/finder

Actual Result:
"About to open another project!" pop up doesn't appear on Double-clicking a scene file in explorer from another project

Expected Result:
"About to open another project!" come up and click on "Open" button closes current project and opens the new project with scene loaded.

Workaround:
Use the File > Open menu or open the second project using the Hub.

Note: Refer attached video

Occurring in: 2019.3.0a11, 2019.3.0a1

Working fine in: 2019.2.0f1

Environment:
Windows 10 and macOS 10.14