System Information
Operating system: Windows-10-10.0.19044-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 2070 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.15

Blender Version
Broken: version: 3.2.0 Beta, branch: master, commit date: 2022-05-25 13:09, hash: rB841a354412c4

Worked: in my test with other blender versions it seems that is has never worked

Short description of error
a mesh has two vertexcolor-attribute, these attributes are used in the shader. It's not working in eevee with gpu-subdiv

Exact steps for others to reproduce the error
in the blendfile the object should have 3different colors, with gpu-subdiv one color can't be seen