I am using the latest pdal docker image to generate a mesh from a laz pointcloud with this pipeline:

[
    {
        "type" : "readers.las",
        "filename": "ground.laz"
    },
    {
        "type": "filters.poisson",
        "depth": 9,
        "density": true
    },
    {
        "type":"writers.ply",
        "faces":true,
        "filename":"poisson7.ply"
    }
]

The ply file has no density property. This also is the case when I use the writers.text writer. The output contains no density information.

Expected behavior
The ply file contains a density property

System/installation information:

$ pdal --version
pdal 2.7.2 (git-version: aa5ec8)