Steps to reproduce:

1. Create a 3D project
2. Add 3D Object -> Cube
3. Window -> Search -> New Window
4. Verify that the "Search" window opens
5. Enter the search string "Cube"
6. Save search results to the "Project" list (diskette -> Save Project)
7. Leave the default name (it should be Cube) and click "Save"
8. Verify that the "Cube" query is selected in the "Project" list
9. Click the "Inspector" button in the Search window
10. Verify, that mentioned window becomes displayed 
11. Select the "Cube.asset" item in the "All" tab (added screenshot in the "Attachments" section
12. Observe the "Inspector" section, it is empty
13. Select the "/Cube (MeshFilter..BoxCollider)" item in the "All" tab
14. Observe the "Inspector" section again, it is empty.
15. Close the "Search" window
16. And open it again
17. Select the same "Cube.asset" item in the "All" tab and observe the "Inspector" section. Now it displays item data
18. Select the "/Cube (MeshFilter..BoxCollider)" item in the "All" tab. Now it displays item data

Expected result: The inspector section in steps 12 and 14 should display the data of the selected item

Actual result: The inspector section is empty.

Reproducible with: 2023.1.0a15, 2023.1.0b12, 2023.2.0a9.

Not Reproducible with: 2021.3.22f1, 2022.2.14f1, 2023.1.0a14.

Cannot test with: 2020.3.46f1 (this stream has no this window).