Steps to reproduce:

1. Create a new project
2. Go to Edit > Project Settings > Graphics
3. Select any dropdown, e.g. "Lightmap Modes"
4. Change the dropdown value from "Automatic" to "Custom"
5. Click on the three dots in the Graphics window
6. Select Reset
7. Observe the dropdown

Actual results: Nothing happens, dropdown value remains as "Custom"; on some versions additional warnings are seen

Expected results: Dropdown value reverts to the previous initial value - "Automatic"

Reproducible with versions: 2023.2.0a13, 6000.0.71f1, 6000.3.12f1, 6000.4.1f1, 6000.5.0b3, 6000.6.0a2

Not reproducible with versions: 2023.2.0a12

Tested on (OS): macOS 26.3

Notes:

• Does not seem to reproduce with values with checkboxes, but reproduces with all Dropdowns
• On some versions, clicking Reset incorrectly changes the "Batch Renderer Group Variants" value to "Strip if Entities Graphics Package is not installed" (causing warnings in Console), even if no manual changes were made to it
• Reset button on dropdowns work in other Project Settings tabs