Unable to open more than one script from unity editor on double clicking and fails to focus exactly the same script that was clicked if the script is already opened in the code editor.

Steps to repro:
1. Create a new project.
2. Create two scripts in the project window.
3. Double click on the first script.
4. Double click on the second script.

Actual Result:
1. First script is opened in the code editor. (Visual Studio)
2. Second script doesn't open in the code editor, instead of the same first script keeps opening.

Expected Result:
Code editor opens and focuses exactly the same script that was clicked.

Environment:
Only on Mac.

Occurring with:
2019.3.0a2, 2019.2.0b1

Working with:
2019.2.0a11, 2019.1.0f2

Note: For 2019.2.0a12, 2019.2.0a13, 2019.2.0a14 Script doesn't open up in the visual studio on Mac even if it's selected as the default code editor
Bug Id: 1146453