Data Source label disappears while drag-moving an element in UI Builder

Steps to reproduce:

1. Create and open a new project
2. Create and open a new UXML in UI Builder
3. Create a Button in the UI Builder's Hierarchy
4. Set its Position > Position Mode to "Absolute" in the UI Builder's Inspector
5. In the UI Builder's Viewport, move the Button and observe the Inspector

Actual results: Data Source label disappears while dragging the element

Expected results: Data Source label doesn't disappear

Reproducible with versions: 6000.5.7f1, 6000.6.0b6, 6000.7.0a1, 6000.7.0a4

Not reproducible with versions: 6000.0.80f1, 6000.3.21f1, 6000.6.0a7

Tested on (OS): Windows 11 Pro (25H2)