Reproduction steps:
1. Open the attached “Test Project” project
2. Make a Clean Build of the Project (File > Build Settings > Build > Clean Build)
3. Open the Project Auditor window (Window > Analysis > Project Auditor)
4. Press the “Analyze” button
5. In the Project Auditor window view Compute Variants (View > Assets > Shaders > Compute Variants)

Expected result: There are no variants with the dynamic_branch keyword
Actual result: There are over one million variants with the dynamic_branch keyword

Reproducible with: 2022.1.0a15, 2022.1.24f1, 2022.3.9f1, 2023.1.13f1, 2023.2.0b9, 2023.3.0a5
Not reproducible with: 2021.3.30f1, 2022.1.0a14

Reproducible on: Windows 10
Not reproducible on: No other environment tested