Get site drives returns used_size_in_bytes in quota as total size of site for each drive

pbansal 

We're experiencing the same regression in our environment. We used to be able to use ListDrives to fetch the size of each site's "Preservation Hold Library"; however, now the values are the same for all drives of the same site. See below for a sample. You can see that "Documents" & "Preservation Hold Library" have the exact same properties for "Quota". (Actual sizes are altered to protect privacy). Could anyone assist? Thanks

{
  "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#drives",
  "value": [
    {
      "name": "Documents",
      "quota": {
        "deleted": 0,
        "remaining": 31487657600943,
        "state": "normal",
        "total": 31487790694400,
        "used": 233093457
      }
    },
    {
      "name": "Preservation Hold Library",
      "quota": {
        "deleted": 0,
        "remaining": 31487657600943,
        "state": "normal",
        "total": 31487790694400,
        "used": 233093457
      }
    }
  ]
}