diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0a80de32e..9f9ea2295 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,7 @@
 - [\#545](https://github.com/cosmos/evm/pull/545) Check if mempool is not nil before accepting nonce gap error tx.
 - [\#585](https://github.com/cosmos/evm/pull/585) Use zero constructor to avoid nil pointer panic when BaseFee is 0d
 - [\#591](https://github.com/cosmos/evm/pull/591) CheckTxHandler should handle "invalid nonce" tx
+- [\#642](https://github.com/cosmos/evm/pull/642) "tx not found in mempool" error on chain startup
 - [\#643](https://github.com/cosmos/evm/pull/643) Support for mnemonic source (file, stdin,etc) flag in key add command.
 - [\#645](https://github.com/cosmos/evm/pull/645) Align precise bank keeper for correct decimal conversion in evmd.
 - [\#656](https://github.com/cosmos/evm/pull/656) Fix race condition in concurrent usage of mempool StateAt and NotifyNewBlock methods.
diff --git a/mempool/mempool.go b/mempool/mempool.go
index 583b42b23..732c0bea4 100644
--- a/mempool/mempool.go
+++ b/mempool/mempool.go
@@ -303,6 +303,10 @@ func (m *ExperimentalEVMMempool) Remove(tx sdk.Tx) error {
 	m.mtx.Lock()
 	defer m.mtx.Unlock()
 
+	if m.blockchain.latestCtx.BlockHeight() == 0 {
+		return nil
+	}
+
 	m.logger.Debug("removing transaction from mempool")
 
 	msg, err := m.getEVMMessage(tx)