Metricbeat Postgres Activity event has all empty values

[krainboltgreene (Kurtis Rainbolt Greene)]

{
	"docker": {
		"container": {
			"id": "78ffe79a6d7221fb806a13fc35d54d24c4111f086026d1968e3fceb4c1504340",
			"name": "20181126185317_sentry-postgres_1",
			"image": "postgres:10.5-alpine",
			"labels": {
				"com": {
					"docker": {
						"compose": {
							"config-hash": "bdd4e9bee9d9d0c9a931e3692e94fa45bc5c9afd398e6381c1260c532c4b0390",
							"service": "sentry-postgres",
							"version": "1.22.0",
							"container-number": "1",
							"oneoff": "False",
							"project": "20181126185317"
						}
					}
				},
				"container_group": "sentry"
			}
		}
	},
	"host": {
		"name": "0ab3186b425f"
	},
	"metricset": {
		"host": "192.168.128.7:5432",
		"module": "postgresql",
		"rtt": 13378,
		"name": "activity"
	},
	"beat": {
		"timezone": "+00:00",
		"hostname": "0ab3186b425f",
		"version": "6.4.2",
		"name": "0ab3186b425f"
	},
	"type": "beats",
	"tags": [
		"beats_input_raw_event"
	],
	"@timestamp": "2018 - 11 - 26 T21: 17: 34.359 Z",
	"@version": "1",
	"postgresql": {
		"activity": {
			"pid": 21,
			"backend_start": "2018-11-26T19:07:49.780Z",
			"user": {
				"name": ""
			},
			"state": "",
			"application_name": "",
			"database": {
				"name": ""
			},
			"client": {
				"hostname": "",
				"address": ""
			},
			"query": ""
		}
	}
}

I'm not sure if this is a problem or not, but I'm definitely willing to devote time to debugging if it helps.