# Amplitude: Amplitude Experiment Issue with Charts Loading

- Impact (vendor’s label): critical
- Status: resolved
- Started: 2026-03-27 15:52 UTC · Resolved: 2026-03-27 17:11 UTC · Duration: 1.3 h
- Updates: 3 · Affected components: Experiment - Web Application, Web Application
- [Vendor status page: https://stspg.io/mvrk13qb1vx7](https://stspg.io/mvrk13qb1vx7)
- [Company: Amplitude](https://rewindex.com/company/amplitude.md)

## 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, sol)_
## Timeline of updates

- **investigating** 2026-03-27 15:52 UTC: 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.
- **identified** 2026-03-27 16:42 UTC: We have identified a fix. We are rolling the fix out.
- **resolved** 2026-03-27 17:11 UTC: We have fixed the issue

## Rewindex changes for this incident

- 2026-03-27 15:52 UTC: [Critical incident: Amplitude Experiment Issue with Charts Loading](https://rewindex.com/change/iac4770c5ab8229.md)


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Canonical: https://rewindex.com/company/amplitude/incidents/51kpvh6wv5rf · Markdown: https://rewindex.com/company/amplitude/incidents/51kpvh6wv5rf.md · JSON: https://rewindex.com/api/v1/companies/amplitude/incidents/51kpvh6wv5rf · Generated 2026-10-18T10:41:48.869Z