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Handle FCU calls with a head before known states

engine-apiCommunication between Consensus and ExecutionCommunication between Consensus and Execution

L1Ethereum clientEthereum client

syncingSnap sync, Full syncSnap sync, Full sync

Status: Open.

Bug

#5558 In lambdaclass/ethrex;

· MegaRedHand opened on Dec 9, 2025

Avoid applying fork choice during snap-sync

engine-apiCommunication between Consensus and ExecutionCommunication between Consensus and Execution

L1Ethereum clientEthereum client

Status: Open.

Bug

#5547 In lambdaclass/ethrex;

· MegaRedHand opened on Dec 7, 2025

Invalid Missing Ancestor Syncing ReOrg is flaky

L1Ethereum clientEthereum client

testingHive tests, execution-spec-tests, etcHive tests, execution-spec-tests, etc

Status: Open.

Bug

#4610 In lambdaclass/ethrex;

· Arkenan opened on Sep 23, 2025

L1: Error not logged when L1 ports are not available

good first issueGood for newcomersGood for newcomers

L1Ethereum clientEthereum client

tech debtRefactors, cleanups, etcRefactors, cleanups, etc

Status: Open.

Bug

#3821 In lambdaclass/ethrex;

· JereSalo opened on Jul 24, 2025

L1: While syncing in Holesky, consensus (lighthouse) report issues regarding Payloads too large

engine-apiCommunication between Consensus and ExecutionCommunication between Consensus and Execution

L1Ethereum clientEthereum client

Status: Open.

Bug

#3058 In lambdaclass/ethrex;

· rodrigo-o opened on Jun 5, 2025

L1: running out of active peers mid syncing never get new ones

L1Ethereum clientEthereum client

p2pIssues related to p2p networkIssues related to p2p network

Status: Open.

Bug

#3050 In lambdaclass/ethrex;

· rodrigo-o opened on Jun 4, 2025

L1: On transaction stress scenarios we discard various due to nonce too high

L1Ethereum clientEthereum client

mempoolIssues related to mempoolIssues related to mempool

Status: Open.

Bug

#2406 In lambdaclass/ethrex;

· fborello-lambda opened on Apr 4, 2025

Correctly handle invalid ancestors

consensusReorgs, Fork Choice, etcReorgs, Fork Choice, etc

L1Ethereum clientEthereum client

Status: Open.

Bug

#2127 In lambdaclass/ethrex;

· rodrigo-o opened on Mar 4, 2025

L1: check and correct how receipts are being computed

L1Ethereum clientEthereum client

rpc-apiPublic rpc-json api for usersPublic rpc-json api for users

Status: Open.

Bug

#1840 In lambdaclass/ethrex;

· JulianVentura opened on Jan 29, 2025

Asertoor <code>Blob Transaction Test</code> is flaky

L1Ethereum clientEthereum client

testingHive tests, execution-spec-tests, etcHive tests, execution-spec-tests, etc

Status: Open.

Bug

#1673 In lambdaclass/ethrex;

· mpaulucci opened on Jan 9, 2025

Bug: alternative payload does not contain the prevRandao opcode tx

consensusReorgs, Fork Choice, etcReorgs, Fork Choice, etc

L1Ethereum clientEthereum client

Status: Open.

Bug

#895 In lambdaclass/ethrex;

· Arkenan opened on Oct 18, 2024