Last week, there were two instances where the Ethereum blockchain experienced temporary loss of block finality, leading to concerns about security. Prysm has released a new version with critical fixes, while developers continue to investigate the cause of the instability. The incident caused delays in deposits onto the Polygon zkEVM chain, but Ethereum developers stress that the network did not go down and the incident helped identify areas for improvement. A post-mortem report is planned for discussion in an upcoming Consensus Layer call.