Flow Mainnet Network Issue
Affected: Block Sealing
Flow Swiss Outage History
Flow Swiss is up right nowFlow Swiss had 8 outages in the last 2 years totaling 34h 17m of downtime — averaging 0.3 incidents per month.
There were 8 Flow Swiss outages since June 12, 2025 totaling 34h 17m of downtime. Each is summarised below — incident details, duration, and resolution information.
Flow Testnet Network Issue
Affected: Flow Testnet
Timeline · 4 updates
Transaction ingestion is degraded
Affected: Flow Testnet
Timeline · 2 updates
- investigating Jan 28, 2026, 07:36 PM UTC
Transaction ingestion is currently degraded. Testnet is also in the Epoch Fallback Mode.
- resolved Jan 28, 2026, 07:59 PM UTC
The incident has been resolved and transactions ingestion has recovered. Testnet will also automatically recover from the Epoch Fallback Mode (thanks to Epoch Fallback Recover mechanism introduced last year - https://github.com/onflow/flow-go/releases/tag/v0.39.0)
Degraded Performance on Testnet and Mainnet EVM Endpoints
Affected: Flow TestnetEVM Gateway
Timeline · 2 updates
- investigating Jan 07, 2026, 04:38 PM UTC
The public EVM endpoint is currently experiencing degraded performance. We’re working with our partners to restore normal service. This is both on Testnet and Mainnet.
- resolved Jan 07, 2026, 05:48 PM UTC
This incident has been resolved.
Transactions are not being ingested
Affected: Collection Finalization
Timeline · 3 updates
- investigating Dec 27, 2025, 01:15 PM UTC
The chain is currently experiencing an issue. We are investigating and will provide updates as they become available.
- identified Dec 27, 2025, 04:39 PM UTC
The Flow Foundation is currently investigating a potential security incident affecting the Flow network. Validators have worked together to halt transaction ingestion (the network won't be processing new transactions for the duration of the halt.) Flow Foundation is actively collaborating with network partners and relevant authorities to address the issue as quickly as possible. Please stay tuned for timely ongoing updates.
- resolved Dec 28, 2025, 03:28 AM UTC
The root cause of the issue has been resolved and the network has been upgraded. See maintenance incident: https://manage.statuspage.io/pages/ytw5bdg6zr13/incidents. However, the collection ingestion is still paused.
EVM Endpoint Degraded / Not Responding
Affected: EVM Gateway
Timeline · 5 updates
Sealing & Finalization halted on Testnet
Affected: Flow Testnet
Timeline · 2 updates
- resolved Jul 10, 2025, 07:10 PM UTC
The issue has been resolved and the network has fully recovered. Please note that this incident impacted Testnet only — Mainnet remained unaffected and continues to operate normally.
- postmortem Jul 11, 2025, 11:23 PM UTC
## **Postmortem: Testnet Sealing and Finalization Interruption – July 10, 2025** **Summary** On July 10, 2025, from 11:02 AM to 11:22 AM PST, Testnet experienced a temporary halt in block sealing and finalization. The issue was identified and resolved within 20 minutes. Mainnet remained fully operational and was not affected at any point. **Root Cause** An internal testing framework inadvertently interfered with Testnet node communications, resulting in a disruption to the consensus process. This occurred due to overlapping configurations between the testing environment and Testnet. **Resolution and Preventative Measures** To ensure this does not happen again: * Firewall rules have been updated to sandbox the internal testing framework, fully isolating it from Testnet environments. * The testing framework has also been modified to avoid any attempts to connect to or interact with the Testnet network. Thank you, Flow Team
Flow Mainnet and Testnet Operational
Affected: Flow TestnetCollection FinalizationGRPC APIBlock FinalizationGRPC Web APITransaction ExecutionREST APIBlock SealingEVM Gateway
Timeline · 2 updates
- monitoring Jun 12, 2025, 07:36 PM UTC
The Flow mainnet and testnet are functioning normally. However, we are currently monitoring a Google Cloud outage that may impact some API endpoints and third-party integrations. While core network operations are unaffected, services relying on Google-hosted components may experience intermittent issues or degraded performance. We will continue to monitor the situation closely and provide updates as more information becomes available. Thank you for your patience.
- resolved Jun 12, 2025, 11:31 PM UTC
The Google Cloud outage has now been resolved. We can confirm that there was no impact on Flow mainnet or testnet during this period. All systems remain fully operational. Thank you for your understanding.