Polygon Completes Hard Fork to Fix Transaction Finality Issue
The Polygon Foundation announced on Wednesday that its network has successfully undergone a hard fork aimed at fixing a recent finality problem on the Polygon Proof-of-Stake chain.
In a statement shared on X, the team confirmed that checkpointing and consensus finalization are now operating normally, with both transactions and state synchronization back on track. “We’ll continue to monitor the network closely to ensure stability,” Polygon Labs said, thanking users for their patience during the disruption.
UPDATE:
The hard fork has been successfully completed, and milestones are now processing normally along with state sync. Checkpoints are going through and consensus finalization has been fully restored on Polygon PoS.
We will continue to monitor the network closely to ensure… https://t.co/UwiAYdcKXu
— Polygon Foundation (@0xPolygonFdn) September 10, 2025
The fix involved updates to Polygon’s two key layers: Bor, the block production component, was upgraded to version 2.2.11-beta2, while Heimdall, responsible for coordinating proof-of-stake validation, moved to version 0.3.1. The upgrade was officially implemented at 3 p.m. UTC.
The issue stemmed from a software bug that delayed Polygon’s “local fast finality,” which the network calls milestones. Although checkpoint finality on Ethereum’s mainnet continued unaffected, the bug caused milestone delays of 10–15 minutes, leading to slower validator sync and transaction confirmation times.
Polygon emphasized that with the fork now live, normal network performance has resumed, and it will maintain close oversight to prevent further disruption.

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