Steps to reproduce:

1.  Create a new project
2.  In the Hierarchy window right-click on existing scene
3.  In the dropdown menu press Add New Scene

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Actual results: 
The newly created scene "Untitled" becomes the active scene

Expected results: 
The newly created scene "Untitled" does not become the active scene

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Reproducible with versions: 
6000.0.64f1, 6000.2.15f1, 6000.3.1f1, 6000.4.0b1, 6000.5.0a3

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Tested on (OS): 
Ubuntu 22
MacOS Sequoia 15.7.2