Unable to isolate kea logs based on severity level.

"Logging": {
    "loggers": [
      {
        "name": "kea-dhcp4",
        "output_options": [
          {
            "output": "/var/log/kea-dhcp4.log"
          }
        ],
        "severity": "WARN"
      },
      {
        "debuglevel": 99,
        "name": "kea-dhcp4",
        "output_options": [
          {
            "output": "/var/log/kea-debug.log"
          }
        ],
        "severity": "DEBUG"
      }
    ]
  }

Above is the portion of kea server config, all the logs are directed to "/var/log/kea-debug.log" irrespective of severity level.

Expected: logs of severity "WARN" and higher to be logged to "/var/log/kea-dhcp4.log".

Perhaps there is a loop missing when scanning the named sections of the logging section?