Duplicate Outputs in Grafana Table

I have this query in Prometheus

count(container_start_time_seconds{container_label_com_docker_swarm_service_name='alertconfigurations-composite-qa',instance=~"[0-9.]+"}) by (instance)

In Prometheus it returns (correctly) only one result.

{instance="<valid ip>"}

In grafana it returns multiple duplicate columns.

Is grafana broken or is there something I’m missing?

Can you investigate what the query response is from Prometheus (when Grafana executes the http query)?

https://localhost:3000/t/how-to-troubleshoot-metric-query-issues/50