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LaunchDarkly: Issue with Experiment Results in case of Flag Variation edits

Affected components: Experimentation (core functionality) - Experiment results analysisExperiment results analysisExperimentation (core functionality) - Experiment results processingExperiment results processing

Timeline of updates

1. investigating2026-04-29 20:19 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.

2. identified2026-04-29 20:49 UTC

   We've identified the issue and are implementing a fix for this behavior.

3. monitoring2026-04-30 00:04 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.

4. resolved2026-05-01 00:09 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.

Impact, status and times are the vendor’s own, as last archived. View on stspg.io (opens in new tab). LaunchDarkly profile · Recent LaunchDarkly incidents · Markdown · JSON