Repo steps:

1. Open Unity Scene (HDRP)
2. Right click in the project window 
3. Create > shadergraph > HDRP > Unlit shadergraph 
4. Pull string out of vertex normal and search "SpeedTree8BillBoard"

Expected Result: No errors in the console 

Actual Result: Error is thrown after attaching to the vertex

Reproducible with: 2022.2.13f1, 2023.1.0b14, 2023.2.0a12

Not reproducible with: 2021.3.12f1

Cant test with: 2020.3.46f1 (Functionality does not exist)

Platforms tested: Win 11

Notes:

MA UNITY_FRAMEBUFFER_FETCH_AVAILABLE UNITY_HARDWARE_TIER1 UNITY_HARDWARE_TIER2 UNITY_HARDWARE_TIER3 UNITY_LIGHTMAP_DLDR_ENCODING UNITY_LIGHTMAP_RGBM_ENCODING UNITY_METAL_SHADOWS_USE_POINT_FILTERING UNITY_NO_DXT5nm UNITY_NO_SCREENSPACE_SHADOWS UNITY_PBS_USE_BRDF2 UNITY_PBS_USE_BRDF3 UNITY_PRETRANSFORM_TO_DISPLAY_ORIENTATION UNITY_UNIFIED_SHADER_PRECISION_MODEL UNITY_VIRTUAL_TEXTURING _ADD_PRECOMPUTED_VELOCITY _SURFACE_TYPE_TRANSPARENT _TRANSPARENT_WRITES_MOTION_VEC

DOTS_INSTANCING_ON INSTANCING_ON SHADER_API_GLES30 UNITY_ASTC_NORMALMAP_ENCODING UNITY_COLORSPACE_GAMMA UNITY_FRAMEBUFFER_FETCH_AVAILABLE UNITY_HARDWARE_TIER1 UNITY_HARDWARE_TIER2 UNITY_HARDWARE_TIER3 UNITY_LIGHTMAP_DLDR_ENCODING UNITY_LIGHTMAP_RGBM_ENCODING UNITY_METAL_SHADOWS_USE_POINT_FILTERING UNITY_NO_DXT5nm UNITY_NO_SCREENSPACE_SHADOWS UNITY_PBS_USE_BRDF2 UNITY_PBS_USE_BRDF3 UNITY_PRETRANSFORM_TO_DISPLAY_ORIENTATION UNITY_UNIFIED_SHADER_PRECISION_MODEL UNITY_VIRTUAL_TEXTURING _ADD_PRECOMPUTED_VELOCITY _SURFACE_TYPE_TRANSPARENT _TRANSPARENT_WRITES_MOTION_VEC