Ethereum layer 2 network Starknet faced downtime on Monday, marking the second major network disruption since the Grinta upgrade rollout in September.

The Starknet team reported it was “back online and fully operational” at 10:30 am ET, after block production had stalled for four hours and eight minutes.

This story is an excerpt from the Unchained Daily newsletter.

“Transactions submitted between 9:24 am and 9:42 am UTC may not have been processed properly. A retrospective, including full timeline, root causes, and long-term prevention measures will follow,” said the team. 

During the Grinta incident, Remote Procedure Call (RPC) failures and sequencer bugs led to a nine-hour halt in block production that required a chain reorganization.