How to reproduce:
1. Open the attached "repro_project.zip" project
2. Open UI/CauldronUI/CauldronMainUI.uxml
3. Select the Cauldron component in the hierarchy
4. Change Background > Slice value to '2'
Expected result: No warnings
Actual result: Override warning is thrown for each value change
Reproducible with: 2021.3.20f1, 2022.2.10f1, 2023.1.0b7, 2023.2.0a5
Warning:
Sprite "Magic House Cauldron " borders (33.00, 38.00, 39.00, 40.00) are overridden by style slices (2.00, 2.00, 2.00, 2.00)
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)