Env:

• OCP4.21
• ACM
• COO1.3.1 with Troubleshooting Panel UIPlugin, Monitoring UIPlugin with acm, incidents and perses enabled

Steps:

1. In Admin perspective, go to Observe > Alerting
2. In Alerts tab, expand Watchdog row
3. Select Watchdog alert
4. Open Troubleshooting Panel from link or 9dots - Signal correlation
5. Click on Focus
6. Result: graph is not rendered
7. In Troubleshooting Panel, click on Advanced link
8. In the Query we have: alert:alert:{"managed_cluster":"8a65b976-8184-472a-9725-ecb2d155627d","namespace":"openshift-monitoring","severity":"none","alertname":"Watchdog"}
9. Remove "managed_cluster":"8a65b976-8184-472a-9725-ecb2d155627d",
10. Click on Refresh button
11. Result: graph is rendered

Note: When we have an env without ACM, it is rendered consistently