sort_by_field returns incorrect results on text fields

Sorting doesn't appear to work correctly on text fields. It does change the order of the results and if you do sort_by_field=-name vs sort_by_field=name you will get different results but the results are not in the expected order.

Field mapping:

    - name: name
      type: text
      fast: true

Results

curl -sS 'http://127.0.0.1:7280/api/v1/noaa-1m/search?query=name:NO&sort_by_field=-name&max_hits=100'
{
  "num_hits": 235019,
  "hits": [
    {
      "name": "VAERNES, NO",
      "split_id": 3,
      "station_id": "01271099999",
      "temperature_c": 8.0,
      "wind_direction_deg": 250,
      "wind_speed_code": "N"
    },
    {
      "name": "FLORO, NO",
      "split_id": 3,
      "station_id": "01310099999",
      "temperature_c": 7.0,
      "wind_direction_deg": 190,
      "wind_speed_code": "N"
    },
    {
      "name": "TROLL A OIL PLATFORM, NO",
      "split_id": 3,
      "station_id": "01087799999",
      "temperature_c": 7.0,
      "wind_direction_deg": 210,
      "wind_speed_code": "N"
    },
    {
      "name": "RYGGE, NO",
      "split_id": 3,
      "station_id": "01494099999",
      "temperature_c": 5.0,
      "wind_direction_deg": 200,
      "wind_speed_code": "N"
    },
    {
      "name": "GULLFAX PLATFORM, NO",
      "split_id": 3,
      "station_id": "01375599999",
      "temperature_c": 8.0,
      "wind_direction_deg": 250,
      "wind_speed_code": "N"
    },
    {
      "name": "SOLA, NO",
      "split_id": 3,
      "station_id": "01415099999",
      "temperature_c": 7.0,
      "wind_direction_deg": 230,
      "wind_speed_code": "N"
    },

Reproduce the issue using the provided field mapping and curl requests against the NOAA dataset, comparing ascending and descending name sorting. Trace the search sorting path for text fields and define done as results appearing in the expected lexical order in both directions, with regression coverage for this case.