Incorrect disk size reported when running in Docker on macOS

[sdavisNL]

Running the agent in Docker Desktop on macOS (Sonoma). Disk mountpoints are configured correctly and the container can see the real filesystem, but the sizes reported in the widget are wildly incorrect.

docker-compose.yml

services:
  glance-agent:
    container_name: glance-agent
    image: glanceapp/agent
    environment:
      TOKEN: ""
      HIDE_MOUNTPOINTS_BY_DEFAULT: "true"
      MOUNTPOINTS: "/host-data:Macintosh HD"
    volumes:
      - /System/Volumes/Data:/host-data:ro
    ports:
      - 27973:27973
    restart: unless-stopped

df -h inside the container shows the mount is correct

/run/host_mark/System/Volumes/Data   2.8T   88.1G   2.8T   3%   /host-data

But the widget reports

Macintosh HD — 23.1 TB / 762.1 TB