How to reproduce:
1. Create a new Unity project
2. In the Project window, right-click -> Create -> Shader Graph -> Any Shader Graph
3. Open the created Shader Graph
4. Quickly press "Space" for a multiple times
5. Observe the results
Expected result: Editor doesn't crash
Actual results: Editor crashes
Reproducible with: 6000.3.0a5
Not reproducible with: 6000.0.56f1, 6000.1.16f1, 6000.2.1f1, 6000.3.0a4
Reproducible on: Ubuntu 24, macOS Sequoia 15.5 (M1)
Not reproducible on: No other environment tested
Note: On Ubuntu, the crash occurs when combining "Space + Enter + arrows", quickly creating nodes with the keyboard reproduces the issue. On macOS, the crash occurs really fast with only "Space"