diff --git a/app/protocol/flows/v5/blockrelay/ibd.go b/app/protocol/flows/v5/blockrelay/ibd.go
index 582a6a475..126503f37 100644
--- a/app/protocol/flows/v5/blockrelay/ibd.go
+++ b/app/protocol/flows/v5/blockrelay/ibd.go
@@ -567,7 +567,7 @@ func (flow *handleIBDFlow) receiveAndInsertPruningPointUTXOSet(
 
 			receivedChunkCount++
 			if receivedChunkCount%ibdBatchSize == 0 {
-				log.Debugf("Received %d UTXO set chunks so far, totaling in %d UTXOs",
+				log.Infof("Received %d UTXO set chunks so far, totaling in %d UTXOs",
 					receivedChunkCount, receivedUTXOCount)
 
 				requestNextPruningPointUTXOSetChunkMessage := appmessage.NewMsgRequestNextPruningPointUTXOSetChunk()
diff --git a/domain/miningmanager/factory.go b/domain/miningmanager/factory.go
index 9f304b8c9..c6bb92db6 100644
--- a/domain/miningmanager/factory.go
+++ b/domain/miningmanager/factory.go
@@ -5,6 +5,7 @@ import (
 	"github.com/kaspanet/kaspad/domain/dagconfig"
 	"github.com/kaspanet/kaspad/domain/miningmanager/blocktemplatebuilder"
 	mempoolpkg "github.com/kaspanet/kaspad/domain/miningmanager/mempool"
+	"github.com/pkg/errors"
 	"sync"
 	"time"
 )
@@ -21,7 +22,15 @@ func (f *factory) NewMiningManager(consensusReference consensusreference.Consens
 	mempoolConfig *mempoolpkg.Config) MiningManager {
 
 	mempool := mempoolpkg.New(mempoolConfig, consensusReference)
-	blockTemplateBuilder := blocktemplatebuilder.New(consensusReference, mempool, params.MaxBlockMass, params.CoinbasePayloadScriptPublicKeyMaxLength)
+	// In the current pruning window (according to 06/04/2022) the header with the most mass weighted 5294 grams.
+	// We take a 10x factor for safety.
+	// TODO: Remove this behaviour once `ignoreHeaderMass` is set to true in all networks.
+	const estimatedHeaderUpperBound = 60000
+	if estimatedHeaderUpperBound > params.MaxBlockMass {
+		panic(errors.Errorf("Estimated header mass upper bound is higher than the max block mass allowed"))
+	}
+	maxBlockMass := params.MaxBlockMass - estimatedHeaderUpperBound
+	blockTemplateBuilder := blocktemplatebuilder.New(consensusReference, mempool, maxBlockMass, params.CoinbasePayloadScriptPublicKeyMaxLength)
 
 	return &miningManager{
 		consensusReference:   consensusReference,