How to reproduce:
- Open the attached “IN-149292_repro” project
- Open “TestEnvLevel2” Scene and observe the GameObjects in the Hierarchy tab
- Open “Launcher” Scene
- Enter Play mode and wait until the Game view loads completely
- Exit Play mode
- Open the “TestEnvLevel2” Scene and observe the result in the Hierarchy tab
Actual result: The Scene’s GameObjects are not displayed in the Hierarchy tab, although these objects are visible in the Scene view
Expected result: The Scene’s GameObjects are displayed in the Hierarchy tab
Reproducible with: 6000.5.0a9 (253a859729df), 6000.5.6f1, 6000.6.0b6, 6000.7.0a3
Not Reproducible with: 6000.3.21f1, 6000.5.0a8
Could not test with: 6000.0.80f1 (Hierarchy V2 is not available in these versions)
Reproducible on: Windows 11 Enterprise (25H2)
Not reproducible on: No other environments tested
Workaround: Restart the Unity Editor to make the Scene's GameObjects appear in the Hierarchy tab again
Note: Reproduces only with Hierarchy V2 enabled. The legacy Hierarchy displays the reopened Scene’s GameObjects correctly