Steps to reproduce:

1. Create a new Unity project using the Universal 3D template
2. Create a new "Cube" GameObject (GameObject > 3d Object > Cube)
3. Open the Animation window (Window > Animation > Animation)
4. Create a new animation by pressing the "Create" button in the Animation window
5. Open the Animator window (Window > Animation > Animator)
6. Click "Layers" button in the Animator window
7. Create a few new layers by pressing the "+" button
8. Click and drag one of the layers to a different order
9. Observe the selected layer in the Inspector window

Actual results: Different layer is shown in the Inspector window than the one selected

Expected results: The selected layer is shown in the Inspector window

Reproducible with versions: 6000.0.56f1, 6000.1.16f1, 6000.2.1f1, 6000.3.0a5

Tested on (OS): macOS Silicon Sequoia 15.5

Notes:

• Adding a Behaviour (Script) in this case doesn’t add it to the selected Layer but in another Layer that is not selected

• Workaround: Click on the Layer again or click on a different Layer