Animation window loses reference to a different selected GameObject when any property is selected

Steps to reproduce:

1. Open the "66ETs.zip" project
2. Open the "SampleScene"
3. Open the "New UI Animation" Animation Clip
4. Select "Anims" GameObject
5. Select any one of the middle properties in the Animation window
6. Observe the Animation window

Actual results: The Animation view changes

Expected results: The property is selected, but the view doesn't change

Reproducible with versions: 6000.6.0a6

Not reproducible with versions: 6000.6.0a5

Can’t test with versions: 6000.0.76f1, 6000.3.16f1, 6000.4.9f1, 6000.5.0b10 (No UI Animation Clip functionality)

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

Notes:

• After opening the Animation window, the issue won't reproduce if the "Anims" GameObject is not selected
• Often reproduces by selecting the keyframe as well. This makes the Animation window very hard to use
• Seems to be reproducible only with the UI Animation Clip properties