Base Halts Block Production on June 25-26 Due to Sequencer Bug, Lasting 116 and 20 Minutes

According to Base, the network experienced two block production halts on June 25-26, lasting 116 minutes and 20 minutes respectively. The root cause stemmed from a sequencer (block builder) logic flaw: after transaction execution failures, old journal states were not properly cleared, causing subsequent valid transactions to encounter incorrect gas calculations, which generated invalid state transitions and paused the L2 chain.

Base confirmed the issue has been resolved through a patch. The team plans to strengthen protocol fuzzing and stress testing to identify potentially malicious transaction paths, while also enhancing monitoring and operational procedures. Additionally, Base intends to introduce recovery mechanisms to improve rapid recovery capabilities in similar future incidents. On-chain assets remained secure throughout the outages.