Animation keyframes are always set to "Clamped Auto" when another option is selected

How to reproduce:

1. Create and open a new project
2. Create a new animation clip
3. Attach it to any GameObject
4. Create an animation strip and add a keyframe
5. Right-click on the keyframe and select “Auto“
6. Right-click on the keyframe again
7. Observe the options

Actual result: “Clamped Auto“ is selected
Expected result: “Auto“ option is selected

Reproducible in: 6000.3.0a1, 6000.3.5f1, 6000.4.0b5, 6000.5.0a5
Not reproducible in: 6000.0.66f1, 6000.2.0b2

Reproduced on: Windows 11 Pro (25H2)
Not reproduced on: No other environment tested

Note: Reproducible with all other options as well