Reproduction steps:
1. Create a new project
2. Open the Import Activity window (Window > Analysis > Import Activity)
3. Dock the Import Activity window
4. Maximize and minimize a different docked window by double-clicking on it
5. Observe the Import Activity window
Actual result: Docked Import Activity window disappears from the layout and “Failed to load” is displayed in Window > Panels menu
Expected result: Import Activity window remains docked and visible
Reproducible with: 6000.0.0f1, 6000.0.80f1, 6000.3.21f1, 6000.5.6f1, 6000.6.0b6, 6000.7.0a3
Reproduced on: macOS Tahoe 26.5 (M4)
Note:
- “Invalid editor window of type: UnityEditor.FallbackEditorWindow, title: Failed to load UnityEditor.EditorApplication:Internal_CallDelayFunctions () (at /Users/bokken/build/output/unity/unity/Editor/Mono/EditorApplication.cs:428)” error is thrown after repeating 2-4 steps
- Issue is not reproducible with other windows