Reproduction steps:
1. Open the user's attached project
2. Create a new GameObject
3. Open Window > Animation > Animation
4. In the Animation window press the 'Create' button
5. Undo and redo the Animation Clip creation
6. Observe the Animator component in the Inspector

Expected result: Animator Controller value gets reset
Actual result: Animator Controller has no value

Reproduced with: 2021.2.0b1, 2021.3.1f1, 2022.1.0f1, 2022.2.0a11
Not reproduced with: 2019.4.38f1, 2020.3.33f1, 2021.2.0a21