History Buffer Drop Down field in the Rendering Debugger Window becomes empty after pressing the Reset button

Steps to reproduce:

1. Open the attached project
2. Open the OutdoorsScene
3. In the Rendering Debugger window, select the Rendering section
4. Observe that the Buffer field under the History Buffers group is set to none as expected
5. Modify debug settings (For example, set Common Materials Properties field to Albedo)
6. Press the Reset button
7. Observe the Buffer field drop-down again

Actual results: Drop-down becomes blank, expanding it, shows that none of the options are selected

Expected results: Drop-down is set to None as it is the default value

Reproducible with versions: 6000.5.0a7, 6000.5.0b1, 6000.6.0a1

Not reproducible with versions: 2022.3.74f1, 6000.0.71f1, 6000.3.11f1, 6000.4.1f1, 6000.5.0a6

Tested on (OS): Windows 11, macOS 26.3.1