Cursor image is not shown or flickers in UI Viewport preview

Steps to reproduce:

1. Open the '' project
2. Open the "SampleScene
3. Open the "" UXML in context (or expand the PanelRenderer foldout in Hierarchy)
4. Enable 'Preview' in the UI Viewport
5. Hover over the button in UI Viewport and observe

Actual results: A custom cursor (image of a feather) shows up for a frame upon entering the Button

Expected results: An image of a feather is shown at the cursor when hovering

Reproducible with versions: 6000.6.0b1, 6000.6.0b8, 6000.7.0a4

Can’t test with versions: 6000.0.81f1, 6000.3.22f1, 6000.5.8f1, 6000.6.0a1 (Doesn't support editing outside of UI Builder)

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

Notes:

• The flickering occurs only on hover starting frame, then it returns to the default cursor
• Flickering occurs on 6000.7.0a4 more than other streams