How to reproduce:
1. Open the attached “IN-84942” project
2. In the Assets folder rename the “Button” texture to “Button_Renamed” or move it to the Test folder
3. Observe the Console window
4. Open the “UXMLTest” UXML file in UI Builder
5. Select Button in Hierarchy pane and change any of the fields in the inspector
6. Save the UXML file in the UI Builder
7. Observe the Console window again

Expected result: The icon-image path is updated accordingly after modifying and saving the UXML file
Actual result: A warning is thrown in the console window and icon-image path is not updated according to the change in the file name after modifying and saving the UXML file

Reproducible in: 6000.0.22f1
Could not test with: 2021.3.44f1, 2022.3.49f1 (Icon Image field does not exist in the Inspector when selecting a Button in UI Builder)

Reproducible on: Windows 11, macOS
Not reproducible on: No other environments tested