🧾 Polygon Heimdall V2 Outage — Short Summary
On Wednesday around 09:30 UTC, the Heimdall V2 mainnet—Polygon’s consensus layer—suffered a temporary outage lasting about one hour due to a suspected consensus bug.
The issue stemmed from an unidentified validator exiting the network, interrupting communication between validator nodes.
Block production remained uninterrupted on the Bor layer, which handles transaction execution and block finalization.
Polygon is now working with RPC providers to resolve sync inconsistencies that emerged after Heimdall’s recovery—one provider has already resumed operations with slight synchronization lag.
The incident comes shortly after the Heimdall V2 upgrade, launched earlier in July. The upgrade overhauls Polygon's tech stack with CometBFT and Cosmos‑SDK v0.50, reducing finality times to around five seconds and marking it as the most technically complex hard fork since Polygon's launch in 2020. $POL