Steps to reproduce:

1. Create a new project using the Universal 3D template
2. Create a new Cube GameObject (GameObject > 3D Object > Cube)
3. Select the newly created Cube GameObject in the Hierarchy window
4. Open the Animation window (Window > Animation > Animation)
5. Dock the Animation window
6. Create a new Animation
7. Repeat step 6
8. Make sure the second created Animation is selected in the Animation window
9. Click the "Add Component" button in the Inspector window
10. Click the "New Script" button
11. Click the "Create and Add" button
12. Observe the selected Animation in the Animation window

Actual results: The first created Animation is now selected in the Animation window

Expected results: The previously selected Animation is still selected (second created Animation)

Reproducible with versions: 6000.0.68f1, 6000.3.10f1, 6000.4.0b9, 6000.5.0a7

Tested on (OS): MacOS Silicon Tahoe 26.2, Ubuntu 24.04