Alerting in Opnsearch email notification

Hello,
I have encountered an issue with Alerting in OpenSearch Dashboards. I configured the query and message, but I noticed that not all notifications are being delivered to my email. What could be the reason for this error?

messages
Monitor “{{ctx.monitor.name}}” just entered alert status. Please investigate the issue.

Trigger: {{ctx.trigger.name}}
Period Start: {{ctx.periodStart}}
Period End: {{ctx.periodEnd}}
Total Events: {{ctx.results.0.hits.total.value}}

{{#ctx.results.0.hits.hits}}

  • Event Time: {{_source.event_time}}
  • User: {{_source.User}}
  • Command Executed: {{_source.CmdSet}}

{{/ctx.results.0.hits.hits}}

@vertigoaisha Have you noticed any errors in the logs or in the Monitor execution?
OpenSearch should report problems with completing actions in the logs.