NullReferenceException Error is thrown and UI Elements Break when Docking a Search Window with 3D Preview in the Inspector Opened

Steps to reproduce:

1. Create any Project
2. Create a GameObject from a primative (e.g. "Cube")
3. Open a Search Window (Window > Search > New Window)
4. Search for that Object's name ("Cube")
5. Select it in the Search Window and open the Search Window's Inspector (F4)
6. Dock that search Window anywhere

Actual results: "NullReferenceException: Object reference not set to an instance of an object" Error is logged in the Console and Some Layout elements are either ineffective until redrawn or are not shown at all, like the docked Window's Label

Expected results: No issues appear when docking the Search Window and elements are selected

Reproducible with versions: 2023.2.0a9, 6000.0.8f1

Not reproducible with versions: 2021.3.40f1, 2022.3.35f1, 2023.2.0a8, 2023.2.20f1

Tested on (OS): Windows 11

Notes:

• It seems that the issue is fixed in 2023.2.20f1, but the regression starts at 2023.2.0a9 for this specific issue. Keep in mind that in 2023.2.0a8 a different issue is present that started as a regression in 2023.2.0a5.