Mantle has released op-reth version 1.6.3 to fix a state-root bug traced to the upstream Reth client. The issue can cause affected nodes to calculate chain state incorrectly, which can leave them out of sync, stalled, or struggling to follow the canonical chain. Mantle says this is an operational fix for node operators, not ordinary users: user assets have not been reported lost, and the action item is for operators to install the patched client while the network is monitored. Node software has to agree on the latest state for the network to keep processing blocks cleanly.
Mantle’s op-reth state-root fix is the kind of client risk that can turn into user pain fast.