diff --git a/consensus/XDPoS/engines/engine_v1/engine.go b/consensus/XDPoS/engines/engine_v1/engine.go
index 731a863e8a..493054c8d2 100644
--- a/consensus/XDPoS/engines/engine_v1/engine.go
+++ b/consensus/XDPoS/engines/engine_v1/engine.go
@@ -482,7 +482,12 @@ func (x *XDPoS_v1) snapshot(chain consensus.ChainReader, number uint64, hash com
 			if s, err := loadSnapshot(x.config, x.signatures, x.db, hash); err == nil {
 				log.Trace("Loaded voting snapshot form disk", "number", number, "hash", hash)
 				snap = s
-				break
+				if len(snap.Signers) > 0 {
+					break
+				} else {
+					log.Warn("skip this snapshot, len of snap signer is 0")
+					snap = nil
+				}
 			}
 		}
 		// If we're at block zero, make a snapshot
diff --git a/consensus/XDPoS/engines/engine_v2/engine.go b/consensus/XDPoS/engines/engine_v2/engine.go
index 1ed03b3633..179e4c0023 100644
--- a/consensus/XDPoS/engines/engine_v2/engine.go
+++ b/consensus/XDPoS/engines/engine_v2/engine.go
@@ -119,7 +119,7 @@ func (x *XDPoS_v2) SignHash(header *types.Header) (hash common.Hash) {
 func (x *XDPoS_v2) Initial(chain consensus.ChainReader, header *types.Header, masternodes []common.Address) error {
 	log.Info("[Initial] initial v2 related parameters")
 
-	if x.highestQuorumCert.ProposedBlockInfo.Round != 0 { // already initialized
+	if !isEmptyHash(x.highestQuorumCert.ProposedBlockInfo.Hash) { // already initialized
 		log.Warn("[Initial] Already initialized")
 		return nil
 	}
@@ -156,12 +156,14 @@ func (x *XDPoS_v2) Initial(chain consensus.ChainReader, header *types.Header, ma
 
 	// Initial timeout
 	log.Info("[Initial] miner wait period", "period", x.config.WaitPeriod)
-
 	// avoid deadlock
 	go func() {
 		x.waitPeriodCh <- x.config.V2.WaitPeriod
 	}()
 
+	// Kick-off the countdown timer
+	x.timeoutWorker.Reset()
+
 	log.Info("[Initial] finish initialisation")
 	return nil
 }
@@ -434,7 +436,11 @@ func (x *XDPoS_v2) IsAuthorisedAddress(chain consensus.ChainReader, header *type
 		}
 	}
 
-	log.Warn("Not authorised address", "Address", address, "MN", masterNodes, "Hash", header.Hash())
+	log.Warn("Not authorised address", "Address", address.Hex(), "Hash", header.Hash())
+	for index, mn := range masterNodes {
+		log.Warn("Master node list item", "mn", mn.Hex(), "index", index)
+	}
+
 	return false
 }
 
diff --git a/consensus/XDPoS/engines/engine_v2/utils.go b/consensus/XDPoS/engines/engine_v2/utils.go
index be99cad26a..336b9f9494 100644
--- a/consensus/XDPoS/engines/engine_v2/utils.go
+++ b/consensus/XDPoS/engines/engine_v2/utils.go
@@ -68,3 +68,12 @@ func decodeMasternodesFromHeaderExtra(checkpointHeader *types.Header) []common.A
 	}
 	return masternodes
 }
+
+func isEmptyHash(hash common.Hash) bool {
+	for _, b := range hash {
+		if b != 0 {
+			return false
+		}
+	}
+	return true
+}
diff --git a/params/config.go b/params/config.go
index 73f04cc114..81e56e59b5 100644
--- a/params/config.go
+++ b/params/config.go
@@ -47,7 +47,7 @@ var (
 		SwitchBlock:           big.NewInt(900),
 	}
 	DevnetXDPoSV2Config = &V2{
-		SwitchBlock:           big.NewInt(9999999), // Temporary set it to very high
+		SwitchBlock:           big.NewInt(7218000),
 		TimeoutWorkerDuration: 50,
 		CertThreshold:         6,
 		WaitPeriod:            2,
diff --git a/params/version.go b/params/version.go
index 70070f932a..435b48e311 100644
--- a/params/version.go
+++ b/params/version.go
@@ -21,10 +21,10 @@ import (
 )
 
 const (
-	VersionMajor = 1          // Major version component of the current release
-	VersionMinor = 4          // Minor version component of the current release
-	VersionPatch = 4          // Patch version component of the current release
-	VersionMeta  = "stable" // Version metadata to append to the version string
+	VersionMajor = 2          // Major version component of the current release
+	VersionMinor = 0          // Minor version component of the current release
+	VersionPatch = 0          // Patch version component of the current release
+	VersionMeta  = "unstable" // Version metadata to append to the version string
 )
 
 // Version holds the textual version string.