LaunchDarkly incident
Issue with Experiment Results in case of Flag Variation edits
Resolved after 1 day 3 hours, affecting Experiment results processing and Experiment results analysis, on April 29, 2026.
We have validated a fix to resolve all remaining experiments with inaccurate sample ratio mismatches (SRMs) or empty experiment results. The vast majority of experiments and experimentation customers were not impacted.
Affected components
Update timeline
- investigating Apr 29, 2026, 08:19 PM UTC
We are aware of an issue affecting some customers that may result in sample ratio mismatches (SRMs) or empty experiment results if flag variations are edited between experiment iterations.
- identified Apr 29, 2026, 08:49 PM UTC
We've identified the issue and are implementing a fix for this behavior.
- monitoring Apr 30, 2026, 12:04 AM UTC
We've released a fix to prevent this issue in new experiments and iterations. We're working to resolve this issue for experiment data recently processed.
- resolved May 01, 2026, 12:09 AM UTC
We have validated a fix to resolve all remaining experiments with inaccurate sample ratio mismatches (SRMs) or empty experiment results. The vast majority of experiments and experimentation customers were not impacted.
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