How to reproduce:
1. Open the user’s attached “UnityBug_RectTransformPrefabVariant” project
2. Select the “Canvas” Prefab in the Project Browser
3. Observe the “Rect Transform” Component in the Inspector
Expected result: Component is greyed out with the “Some values are driven by Canvas” message in the Inspector
Actual result: Component isn’t greyed out, leading to modification allowance to the serialized fields under the Component
Reproducible with: 2020.3.38f1, 2021.3.8f1, 2022.1.13f1, 2022.2.0b5, 2023.1.0a6
Reproduced on: macOS 12.3 (Intel)
Note:
Prefab instances in the Hierarchy are working as expected