# Temporal Cloud: Some customers in AWS us-east-1 may observe a small number of gRPC UNIMPLEMENTED errors

> Temporal Cloud status incident “Some customers in AWS us-east-1 may observe a small number of gRPC UNIMPLEMENTED errors” on 2026-05-27: impact none (vendor’s label), 0 min, 1 update(s). Archived by Rewindex.

Canonical: https://rewindex.com/company/temporal-cloud/incidents/33qc4l699h3g
Last updated: 2026-05-27T15:00:00Z

- Impact (vendor’s label): none
- Status: resolved
- Started: 2026-05-27 15:00 UTC · Resolved: 2026-05-27 15:00 UTC · Duration: 0 min
- Updates: 1
- [Vendor status page: https://status.temporal.io/incidents/33qc4l699h3g](https://status.temporal.io/incidents/33qc4l699h3g)
- [Company: Temporal Cloud](https://rewindex.com/company/temporal-cloud.md)

## Timeline of updates

- **resolved** 2026-05-27 15:00 UTC: Some customers in AWS us-east-1 may observe a small number of gRPC UNIMPLEMENTED errors returned during the time period 15:00-15:30:00 UTC. This issue was investigated and identified as being related to a deployment in the affected region that has been rolled back - no further impact is expected.

_From the vendor’s published history: only the final update text is available for incidents before Rewindex began polling this page._

## Cite this

Status incident (vendor impact label: none) posted by Temporal Cloud, started 2026-05-27 15:00 UTC, resolved after 0 min, 1 update(s).

- Canonical URL: https://rewindex.com/company/temporal-cloud/incidents/33qc4l699h3g
- Citation: Temporal Cloud, “Some customers in AWS us-east-1 may observe a small number of gRPC UNIMPLEMENTED errors” (2026-05-27 15:00 UTC). Archived by Rewindex: https://rewindex.com/company/temporal-cloud/incidents/33qc4l699h3g (CC BY 4.0).
- Markdown link: `[Temporal Cloud: Some customers in AWS us-east-1 may observe a small number of gRPC UNIMPLEMENTED errors (2026-05-27)](https://rewindex.com/company/temporal-cloud/incidents/33qc4l699h3g)`


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Canonical: https://rewindex.com/company/temporal-cloud/incidents/33qc4l699h3g · Markdown: https://rewindex.com/company/temporal-cloud/incidents/33qc4l699h3g.md · JSON: https://rewindex.com/api/v1/companies/temporal-cloud/incidents/33qc4l699h3g · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-04T16:35:58.656Z