Steps to reproduce:

1. Open the attached project
2. Open the testGraph shadergraph asset
3. Right-click and select the Create Node option
4. Wait until the node search window appears
5. Close and reopen the Editor
6. Observe the Shader Graph's search window and Console

Actual results: Shader Graph's search window remains open after project relaunch, but is not fully rendered. A NullReferenceException error is thrown in the Console

Expected results: No errors are thrown after relaunching the project. Shader Graph's window is either closed on project exit/relaunch, or is rendered fully after the project restart

Reproducible with versions: 6000.0.64f1, 6000.3.2f1, 6000.4.0b1, 6000.5.0a3

Reproducible on (OS): macOS 26.1

Not reproducible on (OS): Ubuntu 24.04 (SG Search window is closed automatically when attempting to exit the Editor)

{}Notes{}:

• If the Editor is closed with SG's Search window open, the issue will occur even if a different project is opened. For instance, complete steps 1-4, close the Editor and then create a new 3D URP Template project.