My Azure Monitor alert (metric-based) has an action-group set to notify via email, SMS, mobile app push & webhook/slack.
Alert is triggering, receiving emails and SMS but NOT getting mobile app push and webhook notifications.
Also noticed that I'm not seeing 'subscribed' status on webhook/slack & mobile push (azure monitor infra is likely unable to send a test message to webhook and mobile app). Please see attached screenshot. Unfortunately the portal does not provide any additional logs or details.
Any ideas on how to troubleshoot this?