I noticed this when I upgraded my package from 3.0.9 f3 to 3.7.5. When I tried to adjust the positions of my UI Elements (with the UIRoot set as a prefab), the layout is messed up when I drag it to the scene while it's not played. Upon closer look, it seems the anchor is not getting the UI Root's bounds and extend farther away. Take a look at the screenshots below.
The UI behaves as expected when I run the game getting the correct bounds for the anchor. Can I have some suggestions on how to resolve the proper layout when in editor mode? Thank you very much