Reproduction steps:
1. Open the attached "IN-96770" project
2. In the Toolbar select Herve → Open Dialogue Editor
3. In the Herve window select “Open” and navigate to Tests → Assets → Dialogue Assets and select “TestCache.asset”
4. In the Herve window select “Open” and navigate to Tests → Assets → Dialogue Assets and select “TestFullTraversal.asset”
5. Close the “TestCache” tab by hovering on it in the Herve window and clicking on the X
6. Close the “TestFullTraversal” tab by hovering on it in the Herve window and clicking on the X
7. Observe the Console window

Expected result: Both debug messages will contain “Index : 0”
Actual result: One debug message contains “Index : 0” and the other one contains “Index : 1”

Reproducible with: 6000.0.42f1, 6000.1.0b10, 6000.2.0a6
Could not test with: 2022.3.60f1 (TabView.tabClosed method does not exist)

Reproducible on: Windows 10 (User), Windows 11
Not reproducible on: No other environments tested