# Some customers in AWS us-east-1 may be seeing a small number of gRPC UNIMPLEMENTED errors

- Provider: [Temporal Cloud](https://down.guide/temporal-cloud)
- Level: confirmed
- Impact: Partial outage
- lasted 1h 46m
- started 2026-05-04 22:50 UTC
- us-east-1
- us, us-east-1
- id: DWN-c1131e1b67
- Official page: https://stspg.io/sx58ljjdwqvx

## Updates from Temporal Cloud
### 2026-05-04 22:50 UTC: investigating
We are currently investigating a small number of gRPC UNIMPLEMENTED errors being returned in the AWS us-east-1 region.

### 2026-05-04 23:23 UTC: monitoring
The issue has been identified as being related to a proxy node replacement rollout which has been halted. We are currently monitoring the region but do not anticipate any new errors at this point.

### 2026-05-05 00:36 UTC: resolved
This incident has been resolved.

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