diff --git a/CHANGELOG.md b/CHANGELOG.md
index 114879478..8f7148184 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -87,6 +87,7 @@ program](https://hackerone.com/tendermint).
 - [p2p/conn] [\#3347](https://github.com/tendermint/tendermint/issues/3347) Reject all-zero shared secrets in the Diffie-Hellman step of secret-connection
 - [p2p] [\#3369](https://github.com/tendermint/tendermint/issues/3369) Do not panic when filter times out
 - [p2p] [\#3359](https://github.com/tendermint/tendermint/pull/3359) Fix reconnecting report duplicate ID error due to race condition between adding peer to peerSet and starting it (@guagualvcha)
+- [libs/db/remotedb/grpcdb] [\#3402](https://github.com/tendermint/tendermint/issues/3402) Close Iterator/ReverseIterator after use
 
 ## v0.30.2
 
diff --git a/CHANGELOG_PENDING.md b/CHANGELOG_PENDING.md
index 470282aa9..37ae3a510 100644
--- a/CHANGELOG_PENDING.md
+++ b/CHANGELOG_PENDING.md
@@ -19,4 +19,3 @@
 ### IMPROVEMENTS:
 
 ### BUG FIXES:
-
diff --git a/consensus/replay.go b/consensus/replay.go
index 6656da625..c8ab8a331 100644
--- a/consensus/replay.go
+++ b/consensus/replay.go
@@ -324,12 +324,7 @@ func (h *Handshaker) ReplayBlocks(
 			}
 
 			if res.ConsensusParams != nil {
-				// Preserve TimeIotaMs since it's not exposed to the application.
-				timeIotaMs := state.ConsensusParams.Block.TimeIotaMs
-				{
-					state.ConsensusParams = types.PB2TM.ConsensusParams(res.ConsensusParams)
-				}
-				state.ConsensusParams.Block.TimeIotaMs = timeIotaMs
+				state.ConsensusParams = types.PB2TM.ConsensusParams(res.ConsensusParams, state.ConsensusParams.Block.TimeIotaMs)
 			}
 			sm.SaveState(h.stateDB, state)
 		}
diff --git a/docker-compose.yml b/docker-compose.yml
index 61862e5c1..ccc802040 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -8,7 +8,7 @@ services:
       - "26656-26657:26656-26657"
     environment:
       - ID=0
-      - LOG=$${LOG:-tendermint.log}
+      - LOG=${LOG:-tendermint.log}
     volumes:
       - ./build:/tendermint:Z
     networks:
@@ -22,7 +22,7 @@ services:
       - "26659-26660:26656-26657"
     environment:
       - ID=1
-      - LOG=$${LOG:-tendermint.log}
+      - LOG=${LOG:-tendermint.log}
     volumes:
       - ./build:/tendermint:Z
     networks:
@@ -34,7 +34,7 @@ services:
     image: "tendermint/localnode"
     environment:
       - ID=2
-      - LOG=$${LOG:-tendermint.log}
+      - LOG=${LOG:-tendermint.log}
     ports:
       - "26661-26662:26656-26657"
     volumes:
@@ -48,7 +48,7 @@ services:
     image: "tendermint/localnode"
     environment:
       - ID=3
-      - LOG=$${LOG:-tendermint.log}
+      - LOG=${LOG:-tendermint.log}
     ports:
       - "26663-26664:26656-26657"
     volumes:
diff --git a/libs/db/remotedb/grpcdb/server.go b/libs/db/remotedb/grpcdb/server.go
index bfe65e610..a032292b3 100644
--- a/libs/db/remotedb/grpcdb/server.go
+++ b/libs/db/remotedb/grpcdb/server.go
@@ -138,6 +138,7 @@ func (s *server) SetSync(ctx context.Context, in *protodb.Entity) (*protodb.Noth
 
 func (s *server) Iterator(query *protodb.Entity, dis protodb.DB_IteratorServer) error {
 	it := s.db.Iterator(query.Start, query.End)
+	defer it.Close()
 	return s.handleIterator(it, dis.Send)
 }
 
@@ -162,6 +163,7 @@ func (s *server) handleIterator(it db.Iterator, sendFunc func(*protodb.Iterator)
 
 func (s *server) ReverseIterator(query *protodb.Entity, dis protodb.DB_ReverseIteratorServer) error {
 	it := s.db.ReverseIterator(query.Start, query.End)
+	defer it.Close()
 	return s.handleIterator(it, dis.Send)
 }
 
diff --git a/types/protobuf.go b/types/protobuf.go
index 8cad4608b..e10b91869 100644
--- a/types/protobuf.go
+++ b/types/protobuf.go
@@ -221,7 +221,9 @@ func (pb2tm) ValidatorUpdates(vals []abci.ValidatorUpdate) ([]*Validator, error)
 	return tmVals, nil
 }
 
-func (pb2tm) ConsensusParams(csp *abci.ConsensusParams) ConsensusParams {
+// BlockParams.TimeIotaMs is not exposed to the application. Therefore a caller
+// must provide it.
+func (pb2tm) ConsensusParams(csp *abci.ConsensusParams, blockTimeIotaMs int64) ConsensusParams {
 	params := ConsensusParams{
 		Block:     BlockParams{},
 		Evidence:  EvidenceParams{},
@@ -231,8 +233,9 @@ func (pb2tm) ConsensusParams(csp *abci.ConsensusParams) ConsensusParams {
 	// we must defensively consider any structs may be nil
 	if csp.Block != nil {
 		params.Block = BlockParams{
-			MaxBytes: csp.Block.MaxBytes,
-			MaxGas:   csp.Block.MaxGas,
+			MaxBytes:   csp.Block.MaxBytes,
+			MaxGas:     csp.Block.MaxGas,
+			TimeIotaMs: blockTimeIotaMs,
 		}
 	}
 
diff --git a/types/protobuf_test.go b/types/protobuf_test.go
index 2e29a5028..152c92d12 100644
--- a/types/protobuf_test.go
+++ b/types/protobuf_test.go
@@ -64,9 +64,7 @@ func TestABCIValidators(t *testing.T) {
 func TestABCIConsensusParams(t *testing.T) {
 	cp := DefaultConsensusParams()
 	abciCP := TM2PB.ConsensusParams(cp)
-	cp2 := PB2TM.ConsensusParams(abciCP)
-	// TimeIotaMs is not exposed to the application.
-	cp2.Block.TimeIotaMs = cp.Block.TimeIotaMs
+	cp2 := PB2TM.ConsensusParams(abciCP, cp.Block.TimeIotaMs)
 
 	assert.Equal(t, *cp, cp2)
 }