Inspector loses animation menu items until the frame header is moved when the animated GameObject is selected

Steps to reproduce:

1. Create and open a new project
2. Select Main Camera
3. Open Window -> Animation -> Animation
4. Create a new clip and add the Transform properties to it
5. Edit the Position transform in the Inspector and right-click
6. Observe the context menu

Actual results: No items specific to keying in Animation are displayed

Expected results: All items specific to keying in Animation are displayed (Add key, Remove key, etc.)

Reproducible with versions: 2023.1.0a10, 6000.0.73f1,6 000.3.14f1, 6000.4.4f1, 6000.5.0b5, 6000.6.0a3

Tested on (OS): Windows 11 Pro (25H2)

Notes:

• To reproduce again, select any other GameObject and then the animated GameObject again
• Focusing or pressing elsewhere in the Animation does not work, only the frame header moving will return the missing menu items