Grafana Alerts getting sent multiple times

Are you running Grafana in HA mode? If so, alerts will be evaluated once per replica (which would explain seeing each alert 3 times in the screenshot), but just one notification should be sent. If 3 notifications are being sent for the same alert then I think Grafana has been misconfigured. I see you are using Amazon Managed Grafana, and I don’t know if they use HA or not.