FME metrics impact calculations are not updating

Update timeline

1. monitoring Apr 13, 2026, 04:47 PM UTC

   Feature flag metrics impact calculations were not updating. This issue does not impact experiment calculation. Fix is being rolled out. There is no data loss.

2. resolved Apr 13, 2026, 05:31 PM UTC

   After monitoring post fixing the issue, all systems are back to normal and processing metrics impact calculations regularly. We will provide an RCA soon.

3. postmortem Apr 20, 2026, 03:56 PM UTC

   ## **Summary** _April 13, 2026, FME metrics impact calculations experienced calculations not updated. The root cause was determined to be due to a bug introduced in the software upgrade / release process._ ## **Root Cause** _An internal library upgrade included in the release caused a runtime issue is a legacy execution pathway._ ## **Impact** Feature flag metrics impact calculations were not updating. This issue does not impact experiment calculation, and there is no data loss. ## **Mitigation** _To mitigate we immediately rolled back the update._ ## **Action Items** To prevent such issues from happening again, we are working on fixing gaps in monitoring and alerting for the metrics impact calculations flow.