How to reproduce:
1. Open the “IN-149888” Project
2. Make sure the Entities/Entities Graphics module is installed
3. Make sure Hierarchy V1 is enabled
4. In assets, open the "testscene" scene
5. Enter Play mode
6. Add a comment to the “DummyComment.cs” file
7. Save the changes in the script
8. Observe the changes in the Hierarchy
Actual result: Subscenes in the Hierarchy get a "(duplicate scene)" suffix added
Expected result: Subscenes keep their original names, with no suffix added
Reproducible with: 6000.5.3f1, 6000.5.7f1
Not reproducible with: 1.4.8 (6000.3.21f1), 6000.5.2f1, 6000.6.0b7, 6000.7.0a4
Reproducible on: MacOS 26.5 (M1), Windows 11 (By Reporter)
Not reproducible on: No other environments tested
Note: Issue appeared in 6000.5.X stream and does not seem to have ever effected any other stream