Graph asset icons are corrupted on Ubuntu

Steps to reproduce:

1. Create and open a new project
2. Set up Graph Toolkit example from the documentation
3. Create a graph asset
4. Observe the Project window

Actual results: The graph icon is corrupted

Expected results: The graph icon is consistent of one icon

Reproducible with versions: 0.4.0-exp.1 (6000.3.0a6), 6000.4.5f1, 6000.5.0b6, 6000.6.0a4

Can’t test with versions: 6000.0.74f1, 6000.3.14f1 (Graph Toolkit unavailable)

Reproduced on (OS): Ubuntu 24.04

Not Reproduced on: Windows 11 Pro (25H2)

Notes:

• On Windows and macOS, the icon is missing but consistent. On Linux, the icon changes and is corrupted on each reimport
• Other files (even with no extension) do not have this problem