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Amplitude: Amplitude Experiment Issue with Charts Loading

Impact: criticalStatus: resolvedStarted Resolved (1.3 h)3 updatesSource: stspg.io (opens in new tab)
Summary

Amplitude reported a critical Experiment outage: exposure charts failed to load for some flags, and analysis pages failed for some experiments with user-property errors. It started at 2026-03-27 15:52 UTC and was resolved at 2026-03-27 17:11 UTC, lasting 1 h 19 min; Amplitude rolled out a fix.

Machine-written from the archived incident (Sol). Check the timeline before relying on it.

Affected components: Experiment - Web ApplicationWeb Application

Timeline of updates

  1. investigating

    For some flags, the exposures chart is not loading properly. For some experiments, the analysis page is not loading properly saying "This experiment's user property is not available yet. It will appear after users are assigned." and "Invalid user property gp:". We are working on a fix.

  2. identified

    We have identified a fix. We are rolling the fix out.

  3. resolved

    We have fixed the issue

Rewindex changes for this incident

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