.EndAt same as .StartsAt when alarm ends

Grafana Alerting
1

I have Grafana v11.5.1 (c6c701cf5b) with Prometheus.

Sometimes when i get notification about ended alert it has same end time as start time.
For example:

Started: 2025-03-10 20:18:30 UTC
Ended: 2025-03-10 20:18:30 UTC

Here is snipped from notification template.

Started: <code>{{ .StartsAt | date "2006-01-02 15:04:05 MST" -}}</code>
{{ if eq .Status "resolved" -}}
Ended: <code>{{ .EndsAt | date "2006-01-02 15:04:05 MST" -}}</code>
{{ end }}

What can be the cause of this?