How to reproduce:
1. Open the attached “IN-111533” project
2. Open the “SampleScene”
3. In the Hierarchy, click on the “Cube” GameObject
4. In the Scene View Tools overlay, click on the active tool context
5. In the Tools Settings overlay, click on the Face selection edit mode
6. Select a Face on the “Cube” GameObject
7. Hold the Shift key and drag the blue arrow to extrude the Face
8. Observe the result

Expected result: The Faces appear as they’re being extruded
Actual result: The Faces are invisible as they’re being extruded

Reproducible with: 6.0.6 (6000.0.0f1, 6000.0.55f1, 6000.2.0f1, 6000.3.0a4)
Not reproducible with: 6.0.5 (6000.0.0f1, 6000.0.55f1)

Reproduced on: Windows 11
Not reproduced on: No other environment tested

Note: The Faces appear after releasing Shift-Drag