diff --git a/README.md b/README.md
index 71bbdab3..9ff96c5d 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 <img align="right" width="425px" src="https://github.com/xssnick/props/blob/master/logoimg.png?raw=true">
 
 [![Based on TON][ton-svg]][ton]
-![Coverage](https://img.shields.io/badge/Coverage-73.4%25-brightgreen)
+![Coverage](https://img.shields.io/badge/Coverage-73.3%25-brightgreen)
 
 Golang library for interacting with TON blockchain.
 
diff --git a/tlb/block.go b/tlb/block.go
index 401d6919..66d2e5cc 100644
--- a/tlb/block.go
+++ b/tlb/block.go
@@ -142,7 +142,7 @@ func (h *BlockHeader) LoadFromCell(loader *cell.Slice) error {
 	var infoPart blockInfoPart
 	err := LoadFromCell(&infoPart, loader)
 	if err != nil {
-		return err
+		return fmt.Errorf("failed to load blockInfoPart: %w", err)
 	}
 	h.blockInfoPart = infoPart
 
@@ -150,7 +150,7 @@ func (h *BlockHeader) LoadFromCell(loader *cell.Slice) error {
 		var globalVer GlobalVersion
 		err = LoadFromCell(&globalVer, loader)
 		if err != nil {
-			return err
+			return fmt.Errorf("failed to load GlobalVersion: %w", err)
 		}
 		h.GenSoftware = &globalVer
 	}
@@ -163,29 +163,29 @@ func (h *BlockHeader) LoadFromCell(loader *cell.Slice) error {
 		}
 		err = LoadFromCell(&masterRef, l)
 		if err != nil {
-			return err
+			return fmt.Errorf("failed to load ExtBlkRef: %w", err)
 		}
 		h.MasterRef = &masterRef
 	}
 
 	l, err := loader.LoadRef()
 	if err != nil {
-		return err
+		return fmt.Errorf("failed to load ref for after merge: %w", err)
 	}
 	prevRef, err := loadBlkPrevInfo(l, infoPart.AfterMerge)
 	if err != nil {
-		return err
+		return fmt.Errorf("failed to loadBlkPrevInfo for after merge: %w", err)
 	}
 	h.PrevRef = *prevRef
 
 	if infoPart.VertSeqnoIncr {
 		l, err := loader.LoadRef()
 		if err != nil {
-			return err
+			return fmt.Errorf("failed to load ref for vert incr: %w", err)
 		}
 		prevVertRef, err := loadBlkPrevInfo(l, false)
 		if err != nil {
-			return err
+			return fmt.Errorf("failed to loadBlkPrevInfo for prev vert ref: %w", err)
 		}
 		h.PrevVertRef = prevVertRef
 	}
@@ -195,6 +195,12 @@ func (h *BlockHeader) LoadFromCell(loader *cell.Slice) error {
 func loadBlkPrevInfo(loader *cell.Slice, afterMerge bool) (*BlkPrevInfo, error) {
 	var res BlkPrevInfo
 
+	if loader.IsSpecial() {
+		// TODO: rewrite BlockHeader to pure tlb loader
+		// if it is a proof we skip load
+		return &res, nil
+	}
+
 	if !afterMerge {
 		var blkRef ExtBlkRef
 		err := LoadFromCell(&blkRef, loader)
diff --git a/tlb/stack.go b/tlb/stack.go
index 3d73f5bb..12db6fed 100644
--- a/tlb/stack.go
+++ b/tlb/stack.go
@@ -320,6 +320,10 @@ func (s *Stack) parseValue(slice *cell.Slice) (any, error) {
 				}
 			}
 
+			if root.RefsNum() == 0 {
+				return nil
+			}
+
 			ref, err := root.LoadRef()
 			if err != nil {
 				return fmt.Errorf("failed to load tuple's %d ref, err: %w", i, err)
diff --git a/ton/integration_test.go b/ton/integration_test.go
index f65d6c33..d3de034a 100644
--- a/ton/integration_test.go
+++ b/ton/integration_test.go
@@ -659,7 +659,7 @@ func TestAPIClient_SubscribeOnTransactions(t *testing.T) {
 	defer cancel()
 	ctx := api.Client().StickyContext(_ctx)
 
-	addr := address.MustParseAddr("EQCD39VS5jcptHL8vMjEXrzGaRcCVYto7HUn4bpAOg8xqB2N")
+	addr := address.MustParseAddr("Ef8zMzMzMzMzMzMzMzMzMzMzMzMzMzMzMzMzMzMzMzMzM0vF")
 
 	b, err := api.CurrentMasterchainInfo(ctx)
 	if err != nil {
@@ -672,7 +672,7 @@ func TestAPIClient_SubscribeOnTransactions(t *testing.T) {
 		t.Fatal("get acc err:", err.Error())
 		return
 	}
-	initLT := acc.LastTxLT - 600000000000
+	initLT := acc.LastTxLT - 10
 	log.Println(initLT)
 	lastLT := initLT
 
@@ -682,16 +682,19 @@ func TestAPIClient_SubscribeOnTransactions(t *testing.T) {
 	ch := make(chan *tlb.Transaction)
 	go api.SubscribeOnTransactions(ctx, addr, lastLT, ch)
 
+	gotTx := false
 	for tx := range ch {
 		if lastLT > tx.LT {
 			t.Fatal("incorrect tx order")
 		}
 		lastLT = tx.LT
 
+		gotTx = true
 		println(tx.Now, tx.String())
+		cancel()
 	}
 
-	if lastLT == initLT {
+	if !gotTx {
 		t.Fatal("no transactions")
 	}
 }
diff --git a/tvm/cell/slice.go b/tvm/cell/slice.go
index 9ac257a3..6ecc7d04 100644
--- a/tvm/cell/slice.go
+++ b/tvm/cell/slice.go
@@ -478,6 +478,10 @@ func (c *Slice) LoadBinarySnake() ([]byte, error) {
 	return data, nil
 }
 
+func (c *Slice) IsSpecial() bool {
+	return c.special
+}
+
 func (c *Slice) BitsLeft() uint {
 	return c.bitsSz - c.loadedSz
 }