Reproduction steps:
1. Open the attached "repro_IN-84903" project
2. In the custom Editor overlay, press on the “Scene: …“ button and select “MapEditor“
3. Press on the button that's on the left of the Play Mode button (looks like a map split into three different vertical parts)
4. Select "Edit Sandbox.dfmap"
5. In the overlay of the opened game Scene, press on the button with the lightning or the question mark
6. Notice that the overlay appears without any issues and is functional
7. Open the "Assets/Darfall-ScenarioEditorUI/UIElements/Hierarchy/UXML_Hierarchy.uxml" Visual Tree Asset
8. In the Hierarchy, expand the "#Root" dropdown and select "#Content"
9. In the Inspector, under the "Inlined Styles", expand the "Background" and change the "Color" parameter to any other color
10. Go back to the Game view
11. Press on the button with the lighting or the question mark

Expected result: After pressing any button, information is displayed in the panel
Actual result: After pressing any button, no information is displayed in the panel

Reproducible with: 6000.0.22f1
Couldn't test with: 2021.3.45f1, 2022.3.49f1 - Not possible to launch the reproduction project on these versions due to unresolvable package and Script errors

Reproducible on: Windows 10 (22H2), macOS Sonoma 14.6.1 (user’s)
Not reproducible on: No other environments tested

Note: Not able to test if this reproduces in the Player due to time limitation and complexity of such a test