diff --git a/server/channelserver/handlers.go b/server/channelserver/handlers.go
index 9fed99c89..3dd1fa76c 100644
--- a/server/channelserver/handlers.go
+++ b/server/channelserver/handlers.go
@@ -588,10 +588,11 @@ func handleMsgMhfEnumerateUnionItem(s *Session, p mhfpacket.MHFPacket) {
 	bf := byteframe.NewByteFrame()
 	err := s.server.db.QueryRow("SELECT item_box FROM users, characters WHERE characters.id = $1 AND users.id = characters.user_id", int(s.charID)).Scan(&boxContents)
 	if err != nil {
-		s.logger.Fatal("Failed to get shared item box contents from db", zap.Error(err))
+		s.logger.Error("Failed to get shared item box contents from db", zap.Error(err))
+		bf.WriteBytes(make([]byte, 4))
 	} else {
 		if len(boxContents) == 0 {
-			bf.WriteUint32(0x00)
+			bf.WriteBytes(make([]byte, 4))
 		} else {
 			amount := len(boxContents) / 4
 			bf.WriteUint16(uint16(amount))
@@ -616,7 +617,9 @@ func handleMsgMhfUpdateUnionItem(s *Session, p mhfpacket.MHFPacket) {
 
 	err := s.server.db.QueryRow("SELECT item_box FROM users, characters WHERE characters.id = $1 AND users.id = characters.user_id", int(s.charID)).Scan(&boxContents)
 	if err != nil {
-		s.logger.Fatal("Failed to get shared item box contents from db", zap.Error(err))
+		s.logger.Error("Failed to get shared item box contents from db", zap.Error(err))
+		doAckSimpleSucceed(s, pkt.AckHandle, make([]byte, 4))
+		return
 	} else {
 		amount := len(boxContents) / 4
 		oldItems = make([]Item, amount)
@@ -664,9 +667,9 @@ func handleMsgMhfUpdateUnionItem(s *Session, p mhfpacket.MHFPacket) {
 	// Upload new item cache
 	_, err = s.server.db.Exec("UPDATE users SET item_box = $1 FROM characters WHERE  users.id = characters.user_id AND characters.id = $2", bf.Data(), int(s.charID))
 	if err != nil {
-		s.logger.Fatal("Failed to update shared item box contents in db", zap.Error(err))
+		s.logger.Error("Failed to update shared item box contents in db", zap.Error(err))
 	}
-	doAckSimpleSucceed(s, pkt.AckHandle, []byte{0x00, 0x00, 0x00, 0x00})
+	doAckSimpleSucceed(s, pkt.AckHandle, make([]byte, 4))
 }
 
 func handleMsgMhfGetCogInfo(s *Session, p mhfpacket.MHFPacket) {}
diff --git a/server/channelserver/handlers_data.go b/server/channelserver/handlers_data.go
index dfd9a56ff..62b2282d9 100644
--- a/server/channelserver/handlers_data.go
+++ b/server/channelserver/handlers_data.go
@@ -29,7 +29,9 @@ func handleMsgMhfSavedata(s *Session, p mhfpacket.MHFPacket) {
 		// diffs themselves are also potentially compressed
 		diff, err := nullcomp.Decompress(pkt.RawDataPayload)
 		if err != nil {
-			s.logger.Fatal("Failed to decompress diff", zap.Error(err))
+			s.logger.Error("Failed to decompress diff", zap.Error(err))
+			doAckSimpleSucceed(s, pkt.AckHandle, make([]byte, 4))
+			return
 		}
 		// Perform diff.
 		s.logger.Info("Diffing...")
@@ -39,7 +41,9 @@ func handleMsgMhfSavedata(s *Session, p mhfpacket.MHFPacket) {
 		// Regular blob update.
 		saveData, err := nullcomp.Decompress(pkt.RawDataPayload)
 		if err != nil {
-			s.logger.Fatal("Failed to decompress savedata from packet", zap.Error(err))
+			s.logger.Error("Failed to decompress savedata from packet", zap.Error(err))
+			doAckSimpleSucceed(s, pkt.AckHandle, make([]byte, 4))
+			return
 		}
 		s.logger.Info("Updating save with blob")
 		characterSaveData.decompSave = saveData
@@ -64,9 +68,9 @@ func handleMsgMhfSavedata(s *Session, p mhfpacket.MHFPacket) {
 	}
 	_, err = s.server.db.Exec("UPDATE characters SET name=$1 WHERE id=$2", characterSaveData.Name, s.charID)
 	if err != nil {
-		s.logger.Fatal("Failed to update character name in db", zap.Error(err))
+		s.logger.Error("Failed to update character name in db", zap.Error(err))
 	}
-	doAckSimpleSucceed(s, pkt.AckHandle, []byte{0x00, 0x00, 0x00, 0x00})
+	doAckSimpleSucceed(s, pkt.AckHandle, make([]byte, 4))
 }
 
 func grpToGR(n uint32) uint16 {
@@ -288,7 +292,7 @@ func handleMsgMhfSaveScenarioData(s *Session, p mhfpacket.MHFPacket) {
 	dumpSaveData(s, pkt.RawDataPayload, "scenario")
 	_, err := s.server.db.Exec("UPDATE characters SET scenariodata = $1 WHERE id = $2", pkt.RawDataPayload, s.charID)
 	if err != nil {
-		s.logger.Fatal("Failed to update scenario data in db", zap.Error(err))
+		s.logger.Error("Failed to update scenario data in db", zap.Error(err))
 	}
 	// Do this ack manually because it uses a non-(0|1) error code
 	s.QueueSendMHF(&mhfpacket.MsgSysAck{
diff --git a/server/channelserver/handlers_rengoku.go b/server/channelserver/handlers_rengoku.go
index c1e8d2dbd..732cb77ef 100644
--- a/server/channelserver/handlers_rengoku.go
+++ b/server/channelserver/handlers_rengoku.go
@@ -19,7 +19,9 @@ func handleMsgMhfSaveRengokuData(s *Session, p mhfpacket.MHFPacket) {
 	dumpSaveData(s, pkt.RawDataPayload, "rengoku")
 	_, err := s.server.db.Exec("UPDATE characters SET rengokudata=$1 WHERE id=$2", pkt.RawDataPayload, s.charID)
 	if err != nil {
-		s.logger.Fatal("Failed to update rengokudata savedata in db", zap.Error(err))
+		s.logger.Error("Failed to save rengokudata", zap.Error(err))
+		doAckSimpleSucceed(s, pkt.AckHandle, make([]byte, 4))
+		return
 	}
 	bf := byteframe.NewByteFrameFromBytes(pkt.RawDataPayload)
 	bf.Seek(71, 0)
@@ -34,7 +36,7 @@ func handleMsgMhfSaveRengokuData(s *Session, p mhfpacket.MHFPacket) {
 		s.server.db.Exec("INSERT INTO rengoku_score (character_id) VALUES ($1)", s.charID)
 	}
 	s.server.db.Exec("UPDATE rengoku_score SET max_stages_mp=$1, max_points_mp=$2, max_stages_sp=$3, max_points_sp=$4 WHERE character_id=$5", maxStageMp, maxScoreMp, maxStageSp, maxScoreSp, s.charID)
-	doAckSimpleSucceed(s, pkt.AckHandle, []byte{0x00, 0x00, 0x00, 0x00})
+	doAckSimpleSucceed(s, pkt.AckHandle, make([]byte, 4))
 }
 
 func handleMsgMhfLoadRengokuData(s *Session, p mhfpacket.MHFPacket) {
@@ -42,7 +44,7 @@ func handleMsgMhfLoadRengokuData(s *Session, p mhfpacket.MHFPacket) {
 	var data []byte
 	err := s.server.db.QueryRow("SELECT rengokudata FROM characters WHERE id = $1", s.charID).Scan(&data)
 	if err != nil {
-		s.logger.Fatal("Failed to get rengokudata savedata from db", zap.Error(err))
+		s.logger.Error("Failed to load rengokudata", zap.Error(err))
 	}
 	if len(data) > 0 {
 		doAckBufSucceed(s, pkt.AckHandle, data)