Polygon has successfully carried out a hard fork aimed at fixing a critical finality bug on its proof-of-stake (PoS) network, which recently caused transaction delays. The fix was rolled out Wednesday at 3 p.m. UTC, involving Bor v2.2.11-beta2 and Heimdall v0.3.1, Polygon’s block production and validator coordination layers.
The bug had disrupted Polygon’s “local fast finality,” delaying milestones by 10–15 minutes and slowing transaction confirmations for validators. While Ethereum mainnet checkpoint finality was unaffected, Polygon Labs said the fix restores network performance and that monitoring continues.
Finality ensures a transaction is irreversible once validators reach consensus. Without it, transactions face risks of reorganization or rollback. Polygon has been upgrading its infrastructure this year, including a Heimdall v2 release aimed at stability improvements. That upgrade was described as its most technically complex since 2020 but was soon followed by an hour-long finality disruption. The latest hard fork underscores the network’s ongoing efforts to bolster reliability for users and developers.
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