How to reproduce:
1. Create a new Unity project and import the "MySimpleGraph" Script
2. In the Project window, right-click -> Create -> Graph Toolkit Samples -> Simple Graph
3. Without confirming the name, observe the Asset icon
4. Confirm the name and observe the Asset icon
Expected results: The same icon remains when the name is confirmed
Actual results: The Asset loses the icon when the name is confirmed
Reproducible with: 6000.4.0b7, 6000.5.0a6
Reproducible on: macOS Tahoe 26 (M1)
Not reproducible on: No other environment tested