Grafana Alert query not able to display data

Hi, I’m having this problem with the grafana alert: when creating the alert, it gives me No Data, while same query works just fine for creating the panel chart.
Our backend server is able to receive the alert query, and to send the data back to grafana. Then I’ve hit this odd issue, we found empty data field in network response, the api/v1/eval seems not receive the result data successfully. have anyone met this issue? Thanks!

  • grafana version: enterprise 8.4x
  • data source: Influxdb

same query works well when creating the panel: