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Fixed in Built-in



Found in [Package]


Issue ID




[UI Toolkit] IndexOutOfRangeException is thrown when calling Focus() on a Text field during the Object Initialization

Package: UI Toolkit


Reproduction steps:
1. Open Attached Project "Repro"
2. Add UI Document Component to GameObject
3. Create New Panel Settings (Right-click in project view -> Create -> UI Toolkit -> Panel Settings Asset)
4. Set Panel Settings to "New Panel Settings"
5. Set Source Asset to "LoginDialogVisualTree"
6. Enter Play Mode

Expected result: Unity enters GameView with username TextField Focused
Actual result: IndexOutOfRangeException is thrown

Reproducible with: 1.0.0-preview.16, 1.0.0-preview.17, 1.0.0-preview.18 (2020.3.22f1, 2021.1.28f1), Built-in (2021.2.0f1, 2022.1.0a13)
Could not test with: 2019.4.32f1 (no UI Toolkit package)

  1. Resolution Note (fix version Built-in):

    Fixed in: 2021.2.7f1

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