How to reproduce:
1. Open the attached project "WebVFXGraph"
2. Go to Edit -> Project Settings -> Player -> Other Settings -> Shader Settings
3. Change the "Shader Precision Model" to Unified
4. Observe the Console

Expected results: No errors are thrown
Actual results: Two '"Shader error in 'Hidden/Shader Graphs/BuiltIn Lit Basic'" errors are thrown

Reproducible with: 6000.3.0a2, 6000.3.10f1, 6000.4.0b10, 6000.5.0a7
Not reproducible with: 6000.0.68f1, 6000.2.15f1, 6000.3.0a1

Reproducible on: macOS Tahoe 26 (M1)
Not reproducible on: No other environment tested

First lines of errors:
- Shader error in 'Hidden/Shader Graphs/BuiltIn Lit Basic': 'SampleShadow_ComputeSamples_Tent_5x5': cannot convert output parameter from 'min16float[9]' to 'float[9]' at 2/Library/PackageCache/com.unity.shadergraph@a258065d3e62/Editor/Generation/Targets/BuiltIn/ShaderLibrary/Shadows.hlsl(223) (on metal)
- Shader error in 'Hidden/Shader Graphs/BuiltIn Lit Basic': 'SampleShadow_ComputeSamples_Tent_5x5': cannot convert output parameter from 'min16float[9]' to 'float[9]' at 2/Library/PackageCache/com.unity.shadergraph@58e42bcf55f3/Editor/Generation/Targets/BuiltIn/ShaderLibrary/Shadows.hlsl(223) (on metal)