Polygon Hard Fork Resolves Node-Outage Bug, Network Back Online

Polygon, a leading Ethereum layer-2 scaling solution, successfully restored its Proof-of-Stake (PoS) network on September 10, 2025, after a node bug caused 10-15 minute transaction finality delays. The Polygon Foundation executed a hard fork to address the issue, ensuring full network functionality, as announced on X.

The disruption, triggered by a faulty milestone proposal affecting Bor and Erigon nodes, led to synchronization issues for validators and RPC providers, including Polygonscan. While block production continued, the delay impacted decentralized applications (dApps), prompting concerns from users, including Polymarket traders. Polygon’s team quickly identified the issue, deploying Heimdall v0.3.1 and Bor 2.2.11 beta2 to purge the faulty code, restoring consensus and finality.

The hard fork, completed at 3 p.m. UTC, resolved the milestone lag, with nodes resyncing from block 76,273,070. Polygon emphasized that no funds were lost, and Ethereum checkpoint finality remained active throughout. CEO Sandeep Nailwal praised the team’s swift response, reaffirming Polygon’s commitment to its ambitious upgrade roadmap, including the Heimdall v2 upgrade from July 2025, which cut finality times to ~5 seconds.

This incident underscores the need for rigorous testing and validator coordination in complex blockchain upgrades. Polygon plans to conduct a network audit to prevent future disruptions and has scheduled another mandatory hard fork for September 16, 2025, at block 28,913,694 to enhance stability. The rapid resolution reinforces user trust in Polygon, which supports over $1.4 billion in total value locked and powers major DeFi and NFT ecosystems. As Polygon continues to scale, its proactive approach remains critical to maintaining reliability.