diff --git a/consensus/consensus_v2.go b/consensus/consensus_v2.go
index dfcce475a..bf58e5aaa 100644
--- a/consensus/consensus_v2.go
+++ b/consensus/consensus_v2.go
@@ -32,10 +32,10 @@ var (
 // timeout constant
 const (
 	// CommitSigSenderTimeout is the timeout for sending the commit sig to finish block proposal
-	CommitSigSenderTimeout = 6 * time.Second
+	CommitSigSenderTimeout = 10 * time.Second
 	// CommitSigReceiverTimeout is the timeout for the receiving side of the commit sig
 	// if timeout, the receiver should instead ready directly from db for the commit sig
-	CommitSigReceiverTimeout = 4 * time.Second
+	CommitSigReceiverTimeout = 8 * time.Second
 )
 
 // IsViewChangingMode return true if curernt mode is viewchanging
diff --git a/consensus/leader.go b/consensus/leader.go
index 22313885a..ea331f8b1 100644
--- a/consensus/leader.go
+++ b/consensus/leader.go
@@ -211,6 +211,17 @@ func (consensus *Consensus) onCommit(msg *msg_pb.Message) {
 	if !consensus.isRightBlockNumAndViewID(recvMsg) {
 		return
 	}
+	// proceed only when the message is not received before
+	for _, signer := range recvMsg.SenderPubkeys {
+		signed := consensus.Decider.ReadBallot(quorum.Commit, signer.Bytes)
+		if signed != nil {
+			consensus.getLogger().Debug().
+				Str("validatorPubKey", signer.Bytes.Hex()).
+				Msg("[OnCommit] Already Received commit message from the validator")
+			return
+		}
+	}
+
 	commitBitmap := consensus.commitBitmap
 
 	// has to be called before verifying signature
diff --git a/internal/chain/reward.go b/internal/chain/reward.go
index eeaf1e873..10c1cae30 100644
--- a/internal/chain/reward.go
+++ b/internal/chain/reward.go
@@ -31,7 +31,7 @@ import (
 // timeout constant
 const (
 	// AsyncBlockProposalTimeout is the timeout which will abort the async block proposal.
-	AsyncBlockProposalTimeout = 5 * time.Second
+	AsyncBlockProposalTimeout = 9 * time.Second
 )
 
 func ballotResultBeaconchain(