Mimir managed alerting rule does not send notifications to contact point


In Grafana 9.1.7 I have created a Mimir managed alerting rule as described here. The rule itself works, but when firing it does not send alerts to the webhook I have specified as default contact point. The default contact point works fine, when Grafana managed alerts I have set up fire it will send alerts to the webhook. Does the Mimir managed alerting need some additional configuration to make it work?

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I’m experiencing the same issue here…
Grafana alerts from dashboards are working fine.
Managed alert from Mimir/Loki triggers but no notification send

did anyone manage to solve this problem?