Some shader variants don't show up when "_vertex" is added to shader code

How to reproduce:
1. Open the attached user project
2. Click on the “NewShaderVariants“ shader (“Assets/NewShaderVariants“)
3. In the Inspector, click on the plus below the “Unit/Good“ shader
4. In the Inspector, click on the plus below the “Unit/Bad“ shader

Expected result: All shader variants show up
Actual result: Certain shader variants don’t show up

Reproducible with: 2021.3.8f1, 2022.1.13f1, 2022.2.0b4, 2023.1.0a6
Can’t test with: 2020.3.38f1 (Errors in Console)

Reproduced on: macOS (12.5)

Note: Differences between shaders “Good“ and “Bad“ is that in their code, line 14 is coded to "shader_feature_local" instead of "shader_feature_local_vertex"