NullReferenceException Error is logged in Console when Converting Inspectors Preview to Floating Window

Steps to reproduce:

1. Open any Project
2. Create a Material in the Project Browser
3. Select it and in the Inspector, in the Preview section click the Kebab menu and select "Convert to floating Window"
4. Observe the Console

Actual results: Error "NullReferenceException: Object reference not set to an instance of an object" is printed in Console

Expected results: No Errors are logged

Reproducible with versions: 6000.0.7f1, 6000.0.18f1

Not reproducible with versions: 2021.3.43f1, 2022.3.45f1, 6000.0.6f1

Tested on (OS): macOS Sonoma