We've confirmed that all systems are back to normal with no customer impact as of 04/29, 01:42 UTC. Our logs show the incident started on 04/29, 01:02 UTC and that during the 40 mins that it took to resolve the issue some of customers with Application Insights components in East US and West US may have experienced intermittent data gaps and incorrect alert activation.
Root Cause: The failure was due to intermittent connectivity issue which caused intermittent log data gaps.
Incident Timeline: 40mins - 04/29, 01:02 UTC through 04/29, 01:42 UTC
We understand that customers rely on Application Insights as a critical service and apologize for any impact this incident caused.