Shader Build Settings Keyword text becomes greyed out after applying changes

Reproduction steps:
1. Create a new project
2. Edit > Project Settings… > Graphics
3. Click “+” button to add Keyword Declaration Override
4. Enter any text in newly created Keyword set
5. Click “Apply” button
6. Observe the Keyword set

Actual result: Keyword text in the text field becomes greyed out
Expected result: Keyword text in the text field remains unchanged

Reproducible with: 6000.3.12f1, 6000.4.1f1, 6000.5.0b1, 6000.6.0a1
Couldn’t reproduce with: 6000.0.72f1 (No Keyword Declaration Overrides)

Reproduced on: Windows 11, macOS Sequoia 26.2 (M4)

Note: Issue is resolved by clicking on the Keyword text field and then clicking away from it