Asset Subgraph Icon does not change after unpacking it to a Local Subgraph

Steps to reproduce:

1. Open the attached project
2. Open the Test.texmkr graph asset
3. Select "Sub" Asset Subgraph Node
4. Observe the Subgraph Node Icon and the Icon in the Graph Inspector overlay
5. Right-click on the "Sub" Asset Subgraph Node
6. Select the "Unpack to Local Subgraph" option
7. Observe the Subgraph Node Icon again

Actual results: Asset Subgraph Icon is not updated to a Local Subgraph Icon

Expected results: Asset Subgraph Icon is updated to a Local Subgraph Icon and matches the one shown in the Graph Inspector overlay

Reproducible with versions: 6000.5.0a3, 6000.5.0a6

Not reproducible with versions: 6000.4.0b8, 6000.5.0a2

Can’t test with versions: 6000.0.67f1, 6000.3.7f1 (Graph Toolkit not available as a built-in module)

Tested on (OS): macOS 26.2