Reproduction steps:
1. Open the attached “BugRepro” project
2. Click Window > UI Toolkit > Debugger
3. Enter the Play Mode
4. In the UI Toolkit Debugger window, click “Pick Element”
5. In the Game View, click “2” VisualElement
6. In the UI Toolkit Debugger window, observe the number of VisualElement elements with “#unity-list-view__reorderable-item” id
7. In the Game View, click and drag “2” VisualElement to “1” VisualElement
8. In the UI Toolkit Debugger window, observe the number of VisualElement elements with “#unity-list-view__reorderable-item” id
Expected result: The number of VisualElement elements with “#unity-list-view__reorderable-item” id is 2
Actual result: The number of VisualElement elements with “#unity-list-view__reorderable-item” id is larger than 2
Reproducible with: 2022.2.0b8, 2022.2.2f1, 2023.1.0a5, 2023.1.0a25
Not reproducible with: 2021.3.16f1, 2022.2.0b7, 2023.1.0a1, 2023.1.0a4
Couldn’t test with: 2020.4.44f1 (Project scripts use features not supported in this version)
Reproducible on: Windows 11 Pro 22H2
Note: Reimport project on every Unity Version