How to reproduce:
1. Open the attached "Reproduction" project
2. Open the "SampleScene" scene
3. Select the "Coin" GameObject in the Hierarchy and make sure the Animation window is visible
4. Enter and stop the Play Mode
5. Observe the results
Expected results: The Animation window shows the selected GameObject Animation
Actual results: The animation window shows "No animatable object selected" despite GameObject being selected
Reproducible with: 2022.3.56f1, 6000.0.34f1, 6000.1.0b2
Reproducible on: macOS Sequoia 15.1 (M1)
Not reproducible on: No other environment tested
Note: The animation is displayed again when you refocus the Animation tab