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. Right-click on the Main Preview -> Custom Mesh
5. Observe the results

Expected result: No warnings are spawned and the text in the Mesh Selector is normal
Actual results: 6 warnings are spawned and part of the text in all Selectors (Mesh, Texture) becomes red

Reproducible with: 6000.3.0a1, 6000.3.0a5
Not reproducible with: 6000.0.56f1, 6000.1.16f1, 6000.2.0b2, 6000.2.1f1

Reproducible on: Ubuntu 24, macOS 15.6
Not reproducible on: No other environment tested

Notes:
- Restarting the project fixes the issue
- Once the issue is reproduced, the warnings are not spammed when opening Selectors, but the red text persists until restart
- Rarely, the issue is not reproducible after the restart, but most of the time it is reproducible
- Can reproduce it only when the first Selector opened in the session is in Shader Graph

Sample warning:
Unable to find style 'ObjectPickerSmallStatus' in skin 'GameSkin' <called outside OnGUI>