Grafana9 Fired Alerts are not reflecting custom-labels

Steps to Reproduce: #1 Add service with custom labels flag  pmm-admin add mongodb --username="root" --password="root" --enable-all-collectors --custom-labels=database="pricing" mongodb-latest #2 navigate to inventory page and verify that label is displayed at other details coll  #3 Create Alert rule for that mongodb service  #4 wait until alert is triggered. Actual Result: custom-label is not visible at fired alert at all.  Expected Result: it should work as in previous version that means custom-flag should be reflected via the fired alert.