How to reproduce:
1. Open the attached “BoneExpose.zip” project
2. Open the “SampleScene”
3. In the Project window, select "Assets/basichuman.fbx"
4. Under the Rig tab, notice that no extra transforms are exposed under Extra Transforms to Expose
5. In the Hierarchy window, expand the "basichuman" GameObject
6. Notice only the "Cube” child object
7. From the Menu, run "Tools/Expose Hips and Neck"
8. Notice that “hips” and “neck” child objects appeared
9. In the Project window, select "Assets/basichuman.fbx" and navigate to the Rig tab again
10. Observe the Extra Transforms to Expose field

Expected result: “hips” and “neck” checkboxes are marked
Actual result: “hips” and “neck” checkboxes are empty

Reproducible in: 2021.3.47f1, 2022.3.55f1, 6000.0.33f1, 6000.1.0a10

Reproducible on: Windows 11
Not reproducible on: No other environments tested