Resolved after 5 hours 3 minutes, affecting Arbitrum - Sepolia and Sepolia - WebSocket API and 1 more, on March 23, 2026.
A fix has been implemented and we are monitoring the results.
Affected components
Arbitrum - SepoliaSepolia - WebSocket APISepolia — WebhooksSepolia — Streams
Update timeline
- investigating Mar 23, 2026, 05:17 PM UTC
We are investigating reports that Arbitrum Sepolia is stalled at block height 252,909,123 and may not be progressing normally. The Arbitrum foundation team is actively looking into the issue, and we are monitoring closely while coordinating updates. Customers may see stale “latest block” data until block production resumes.
- monitoring Mar 23, 2026, 10:10 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Mar 23, 2026, 10:20 PM UTC
This incident has been resolved.
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