LaunchDarkly incident

Issue with Experiment Results in case of Flag Variation edits

Minor Resolved View vendor source →

LaunchDarkly experienced a minor incident on April 29, 2026 affecting Experiment results processing and Experiment results analysis, lasting 1d 3h. The incident has been resolved; the full update timeline is below.

Started
Apr 29, 2026, 08:19 PM UTC
Resolved
May 01, 2026, 12:09 AM UTC
Duration
1d 3h
Detected by Pingoru
Apr 29, 2026, 08:19 PM UTC

Affected components

Experiment results processingExperiment results analysis

Update timeline

  1. 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.

  2. identified Apr 29, 2026, 08:49 PM UTC

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

  3. 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.

  4. 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.