System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce RTX 2080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.72

Blender Version
Broken: version: 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash: rB02948a2cab44
Worked: (newest version of Blender that worked as expected)

Short description of error
The Attribute Node with Type Object does not work with Volume Shaders.
The bug does not occur when using Open Shading Language in Cycles or when using Eevee.

Exact steps for others to reproduce the error
I added a custom property to the Object.
Then I use the Attribute node in the Shader Editor to drive the Density in the Principled Volume Shader. (The Problem is the same with any Value in any Volume shader)
The Attribute node is set to Type Object and I set the Name to the created property.
The Shader always behaves as if the value was 0.