We've confirmed that all systems are back to normal with no customer impact as of 4/10, 15:29 UTC. Our logs show the incident started on 4/10, 15:01 UTC and that during the 28 minutes that it took to resolve the issue, customers may have experienced data latency and data loss for Application Insights resources in West Europe.
Root Cause: The failure was due to a back end service that became unhealthy.
Incident Timeline: 28 minutes - 4/10, 15:01 UTC through 4/10, 15:29 UTC
We understand that customers rely on Application Insights as a critical service and apologize for any impact this incident caused.