Multiple notification messages for same alert group with Cortex Alertmanager

[vaishnavi216]

Describe the bug
We have tried Alert grouping via cortex alertmanager ,

Notification policy added

when Alert firing First notification contains all 5 agent instances, the next one randomly picked 2 agent instances(3 and 6) and another one picked 1 instance(2) from the first notification.

To Reproduce
Create alert same as above , and add notification policy (priority=P5)

Expected behavior
Expecting only one notification with all Priority=P5 alerts(all 5 instance in one group)

Environment:
cortex version : v1.13.0

[jeromeinsf]

@vaishnavi216 Could you provide the alertmanager configuration used?

[stale]

This issue has been automatically marked as stale because it has not had any activity in the past 60 days. It will be closed in 15 days if no further activity occurs. Thank you for your contributions.