Issue with Experiment Results in case of Flag Variation edits

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.