Highest load does not return values for all zones

[ttben]

Routes : http://51.210.182.41:8080/api/v1/zones/installations/load/last?filter=highest

Result :

[
  {
    "zoneId": "FR-24",
    "snapshots": [
      {
        "datetime": "2020-08-15T21:00:00+02:00",
        "highest": "bioenergy"
      }
    ]
  },
  {
    "zoneId": "FR-11",
    "snapshots": [
      {
        "datetime": "2020-08-15T21:00:00+02:00",
        "highest": "bioenergy"
      }
    ]
  },
  {
    "zoneId": "FR-93",
    "snapshots": [
      {
        "datetime": "2020-08-15T21:00:00+02:00",
        "highest": "fossil"
      }
    ]
  },
  {
    "zoneId": "FR-32",
    "snapshots": [
      {
        "datetime": "2020-08-15T21:00:00+02:00",
        "highest": "bioenergy"
      }
    ]
  },
  {
    "zoneId": "FR-53",
    "snapshots": [
      {
        "datetime": "2020-08-15T21:00:00+02:00",
        "highest": "bioenergy"
      }
    ]
  },
  {
    "zoneId": "FR-76",
    "snapshots": [
      {
        "datetime": "2020-08-15T21:00:00+02:00",
        "highest": "bioenergy"
      }
    ]
  },
  {
    "zoneId": "FR-28",
    "snapshots": [
      {
        "datetime": "2020-08-15T21:00:00+02:00",
        "highest": "hydraulic"
      }
    ]
  },
  {
    "zoneId": "FR-44",
    "snapshots": [
      {
        "datetime": "2020-08-15T21:00:00+02:00",
        "highest": "nuclear"
      }
    ]
  },
  {
    "zoneId": "FR-52",
    "snapshots": [
      {
        "datetime": "2020-08-15T21:00:00+02:00",
        "highest": "bioenergy"
      }
    ]
  },
  {
    "zoneId": "FR-75",
    "snapshots": [
      {
        "datetime": "2020-08-15T21:00:00+02:00",
        "highest": "bioenergy"
      }
    ]
  },
  {
    "zoneId": "FR-84",
    "snapshots": [
      {
        "datetime": "2020-08-15T21:00:00+02:00",
        "highest": "bioenergy"
      }
    ]
  },
  {
    "zoneId": "FR",
    "snapshots": [
      {
        "datetime": "2020-08-15T21:00:00+02:00",
        "highest": "nuclear"
      }
    ]
  }
]

Note that it is missing FR-27.