Is Dashboards Alerting feature compatible with HA design?

I have two instances of Opensearch Dashboards running behind a typical web load balancer. I do this to provide high availably for the Opensearch Dashboard service.
Is this compatible with the Alerting feature? If I configure a monitor, do both Dashboards instances do the polling, duplicating the effort of the other one? Potentially making for duplicate alerts send out, too?

Moved to alerting category.