diff --git a/CHANGELOG.md b/CHANGELOG.md
index 11714be6e8..ae2fcb0303 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -25,11 +25,13 @@ Changelog for NeoFS Node
 - `neofs_node_engine_list_objects_time_bucket` metric (#3120)
 - The correct role parameter to invocation (#3127)
 - nil pointer error for `storage sanity` command (#3151)
+- Process designation event of the mainnet RoleManagement contract (#3134)
 
 ### Changed
 - Number of cuncurrenly handled notifications from the chain was increased from 10 to 300 for IR (#3068)
 - Write-cache size estimations (#3106)
 - New network map support solving the limit of ~320 nodes per network
+- Calculation of VUB for zero hash (#3134)
 
 ### Removed
 - Drop creating new eacl tables with public keys (#3096)
diff --git a/pkg/innerring/state.go b/pkg/innerring/state.go
index abd5dfec7f..e596ed1f82 100644
--- a/pkg/innerring/state.go
+++ b/pkg/innerring/state.go
@@ -123,15 +123,18 @@ func (s *Server) voteForFSChainValidator(validators keys.PublicKeys, trigger *ut
 		nonce uint32 = 1
 		vub   uint32
 		vubP  *uint32
+		hash  util.Uint256
 	)
 
 	if trigger != nil {
-		nonce, vub, err = s.morphClient.CalculateNonceAndVUB(*trigger)
-		if err != nil {
-			return fmt.Errorf("could not calculate nonce and `validUntilBlock` values: %w", err)
-		}
-		vubP = &vub
+		hash = *trigger
+	}
+
+	nonce, vub, err = s.morphClient.CalculateNonceAndVUB(hash)
+	if err != nil {
+		return fmt.Errorf("could not calculate nonce and `validUntilBlock` values: %w", err)
 	}
+	vubP = &vub
 
 	s.contracts.alphabet.iterate(func(ind int, contract util.Uint160) {
 		_, err := s.morphClient.NotaryInvoke(contract, 0, nonce, vubP, voteMethod, epoch, validators)
diff --git a/pkg/morph/client/notary.go b/pkg/morph/client/notary.go
index 27d0a051d1..e0ed27a935 100644
--- a/pkg/morph/client/notary.go
+++ b/pkg/morph/client/notary.go
@@ -268,7 +268,7 @@ func (c *Client) UpdateNotaryList(notaries keys.PublicKeys, txHash util.Uint256)
 
 	nonce, vub, err := c.CalculateNonceAndVUB(txHash)
 	if err != nil {
-		return fmt.Errorf("could not calculate nonce and `valicUntilBlock` values: %w", err)
+		return fmt.Errorf("could not calculate nonce and `validUntilBlock` values: %w", err)
 	}
 
 	return c.notaryInvokeAsCommittee(
@@ -292,7 +292,7 @@ func (c *Client) UpdateNeoFSAlphabetList(alphas keys.PublicKeys, txHash util.Uin
 
 	nonce, vub, err := c.CalculateNonceAndVUB(txHash)
 	if err != nil {
-		return fmt.Errorf("could not calculate nonce and `valicUntilBlock` values: %w", err)
+		return fmt.Errorf("could not calculate nonce and `validUntilBlock` values: %w", err)
 	}
 
 	return c.notaryInvokeAsCommittee(
@@ -767,6 +767,13 @@ func (c *Client) CalculateNonceAndVUB(hash util.Uint256) (nonce uint32, vub uint
 
 	nonce = binary.LittleEndian.Uint32(hash.BytesLE())
 
+	if hash.Equals(util.Uint256{}) {
+		vub, err = c.notaryTxValidationLimit(conn)
+		if err != nil {
+			return 0, 0, fmt.Errorf("could not get vub validation limit: %w", err)
+		}
+		return nonce, vub, nil
+	}
 	height, err := c.getTransactionHeight(conn, hash)
 	if err != nil {
 		return 0, 0, fmt.Errorf("could not get transaction height: %w", err)
diff --git a/pkg/morph/event/rolemanagement/designate.go b/pkg/morph/event/rolemanagement/designate.go
index 9640641b9c..431d9a2d3e 100644
--- a/pkg/morph/event/rolemanagement/designate.go
+++ b/pkg/morph/event/rolemanagement/designate.go
@@ -40,6 +40,6 @@ func ParseDesignate(e *state.ContainedNotificationEvent) (event.Event, error) {
 
 	return Designate{
 		Role:   noderoles.Role(bi.Int64()),
-		TxHash: e.Container,
+		TxHash: util.Uint256{},
 	}, nil
 }