Timeseries and Location Category Group Descriptions won't write

If I post this:

{
  "office-id": "MVP",
  "id": "Test loc group",
  "location-category": {
    "office-id": "MVP",
    "id": "Test loc cat",
    "description": "Test loc cat descript"
  },
  "description": "Test loc group descript",

  "loc-group-attribute": 0
 
}

but then then get this (note location-category.description is missing):

[
  {
    "office-id": "MVP",
    "id": "Test loc group",
    "location-category": {
      "office-id": "MVP",
      "id": "Test loc cat"
    },
    "description": "Test loc group descript"
  }
]

Behavior appears to be the same with both the location and timeseries category/group endpoints.

Reproduce the POST-then-GET examples for the location and timeseries category/group endpoints described in the issue, comparing the submitted and returned descriptions. Trace the relevant REST endpoint handling and run its existing tests if available; done means location-category descriptions persist and are returned for both endpoint groups.