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Polygon completes hard fork to fix finality bug behind transaction delays

Polygon PoS, one of the largest Ethereum scaling networks, has successfully implemented a hard fork to fix a bug that caused 10–15 minute transaction finality delays earlier today. The fix, confirmed by the Polygon Foundation, restores full consensus and normal network operations.

  • Bug caused 10–15 minute delays in validator synchronization and block finality.
  • Upgrade rolled out as v2.2.11-beta2 for Bor and v0.3.1 for Heimdall.
  • Transactions, checkpoints, and state sync are now fully restored.
  • POL token briefly dipped 4% but has since rebounded.

On Wednesday, Polygon’s proof-of-stake (PoS) chain encountered a finality issue that slowed transaction confirmations and validator synchronization. The bug, traced back to Polygon’s node software, led to delays in “milestones” — the project’s term for local fast finality markers on the L2 network.

While checkpoint finality on Ethereum mainnet continued without disruption, the lag in Polygon’s own finality layer created 10–15 minute delays, frustrating users and validators.

To address the issue, Polygon Labs rolled out a hard fork upgrade at 3 p.m. UTC, introducing:

  • Bor v2.2.11-beta2, which manages block production.
  • Heimdall v0.3.1, which coordinates validator consensus.

The Foundation later confirmed the upgrade was successfully completed, with all network functions — transactions, state sync, and consensus finalization — back to normal.

The team behind the major Ethereum Layer 2 network said on X. Source: Polygon on X

“Checkpoints are going through and consensus finalization has been fully restored on Polygon PoS,” the team posted on X, adding that engineers would continue monitoring the network closely.

The cause of the bug remains unclear, but Polygon has faced finality disruptions before. Earlier this year, the team released Heimdall v2, its “most technically complex hard fork since 2020,” to improve validator coordination and remove old technical debt. Weeks later, however, Polygon suffered another hour-long finality halt.

Market reaction to the latest incident was muted. POL, Polygon’s native token, fell by about 4% during the delay but has since recovered as the fix restored confidence in network stability.

Final Thought

Polygon’s swift response highlights both the challenges and maturity of large-scale L2 operations. While bugs in consensus layers can create short-term disruptions, the rapid deployment of fixes — coupled with Polygon’s history of iterative upgrades — reinforces its position as one of Ethereum’s most critical scaling solutions.

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