Can query api but no records returned

Plugins Performance Analyzer
1

I have a recently installed 1.12.0 cluster (3 nodes). I am evaluating using OD instead of Elasticsearch “main”.
I installed perf-top-linux, but saw no metrics in the dashboard.
I saw in the logs for opendistro-performance-analyzer.service errors about batch_metrics_enabled.conf missing. I followed This Issue and the errors are gone. However, I still get no metrics in perftop.
I can query the api just fine, however I noticed the “records” field is empty:

curl -XGET 'http://localhost:9600/_opendistro/_performanceanalyzer/metrics?metrics=Latency,CPU_Utilization&agg=avg,max&dim=ShardID&nodes=all'
I get results, but no records:

{
  "local": {
    "timestamp": 1608305825000,
    "data": {
      "fields": [
        {
          "name": "ShardID",
          "type": "VARCHAR"
        },
        {
          "name": "Latency",
          "type": "DOUBLE"
        },
        {
          "name": "CPU_Utilization",
          "type": "DOUBLE"
        }
      ],
      "records": []
    }
  }
}

Am I Missing something obvious?
thank you