Reproduction steps:
1. Open the attached project “SkyboxRepro”
2. Open the “Assets/Skybox/Skybox_bad” Shader Graph Asset file
3. In the Graph Inspector check the “Allow Material Override” checkbox
4. Open the Scene view and inspect it
5. Uncheck the “Allow Material Override” checkbox
6. Open the Scene view and inspect it

Expected result: The Skybox is rendered identically when the “Allow Material Override” checkbox is both checked and unchecked
Actual result: The Skybox is rendered differently when the “Allow Material Override” checkbox is checked and unchecked

Reproducible with: 14.0.2 (2022.2.0a9, 2022.2.0a14), 14.0.5 (2022.2.3f1), 15.0.3 (2023.1.0a25)
Not reproducible with: 12.1.8 (2021.3.16f1), 13.1.9 (2022.1.24f1), 14.0.1 (2022.2.0a8)
Couldn't test with: 10.10.1 (2020.3.43f1) Shader Graph does not have “Allow Material Override” checkbox

Reproducible on: macOS 13.1 (Intel)