Reproduction steps:
1. Open the attached “BugRepro” project
2. Select the “Assets/Editor/SomeObject.asset” asset in the Project window
3. Drag and drop “Assets/Editor/SomeObject.asset” asset onto both the ReorderableArray and NonReorderableArray headers in the Inspector window
4. Observe the Changed flag displayed in the Inspector window

Expected result: The Changed flag becomes True for both
Actual result: For NonReorderableArray the Changed flag becomes True, but for ReorderableArray the Changed flag remains False

Reproducible with: 6000.0.56f1, 6000.2.2f1, 6000.3.0b1

Reproducible on: Windows 11
Not reproducible on: No other environment tested

Note: Not reproducible with Non-reorderable lists