UI Shader Graph Preview is rendered in Game view after creating or deleting a UI Document in the Scene

Steps to reproduce:

1. Open the attached project
2. Open the SampleScene
3. Open the testGraph shadergraph asset
4. Switch to Game view
5. Create a UI Document object in the Scene
6. Observe the Game view

Actual results: UI Shader Graph's Preview is rendered in the Game view

Expected results: UI Shader Graph's Preview is not rendered in the Game view

Reproducible with versions: 6000.3.0a6_6966ed4b28e1, 6000.3.2f1, 6000.4.0b2, 6000.5.0a3

Not reproducible with versions: 6000.3.0a5_36d7e9fd6645

Can’t test with versions: 6000.0.64f1, 6000.3.0a4 (UI Shader graphs were not yet available)

Tested on (OS): Ubuntu 24.04, macOS 26.1

Notes:

• The issue does not reproduce if the ShaderGraph window was not opened
• Preview artifacts disappear from the Game view after entering Play mode. However, they will reappear if the steps are repeated
• The issue occurs when a UI Document object is created or deleted in the Scene's Hierarchy