Steps to reproduce:

1. Create new project
2. Add empty game object to the hierarchy
3. Create new game object as a child of object added in step 2
4. Add Canvas component to the child object

Actual result: Canvas component is shown as if it was nested under another Canvas (has no Render Mode field, for example)
Expected result: Canvas component has all controls it would have without any parent game object

Reproduced with: 2021.2.0a12, 2021.2.0a15
Not reproducible: 2018.4.32f1, 2020.3.4f1, 2021.1.2f1, 2021.2.0a5