On September 10, 2025, two leading second-layer networks of the Ethereum ecosystem – Linea and Polygon – reported serious technical disruptions affecting transaction processing and the functionality of decentralized applications.
This is reported by Business • Media
Linea Suspended Transaction Processing Due to Sequencer Failure
The Linea network experienced a critical failure of its main sequencer, which the development team described as “performance degradation.” According to LineaScan, blocks were not being created for over 40 minutes, completely halting transactions on the network. Users on social media reported stuck transactions and the unavailability of decentralized applications. The duration of the network outage was estimated to be between 27 and 55 minutes.
“We are observing a decrease in performance in the main Linea network sequencer. The issue has been identified, and a fix is being implemented,” stated Linea in a message on the project’s status page.
This incident has once again raised concerns about the centralization of sequencers in L2 networks. Such situations spark discussions about the vulnerabilities of infrastructure based on a single sequencer and have repeatedly become a basis for criticism.
Polygon Reported Finalization Delays Due to Bor/Erigon Failure
The Polygon network also confirmed disruptions related to delays in consensus finalization. The issues arose due to a temporary malfunction of the Bor and Erigon clients. Although the chain remained active, some users experienced interruptions in accessing applications via RPC.
“Bor/Erigon experienced a temporary failure that led to finalization delays.”
The Polygon team noted that restarting nodes helped many validators and RPC providers restore functionality. Active collaboration with network participants is ongoing to fully restore user services.
Similar technical issues have occurred in Linea before – notably in 2024 during a hacker attack on the decentralized exchange Velocore, when block generation was also temporarily halted. This sparked a widespread discussion about the balance between security, speed, and the level of decentralization.
Reliability and continuity of operation remain key challenges for L2 networks competing with alternative scaling solutions and other blockchains.