diff --git a/CHANGELOG.md b/CHANGELOG.md
index 544af38bef46..5fcd2a9310fc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -312,6 +312,7 @@ extension interfaces. `module.Manager.Modules` is now of type `map[string]interf
 * (server) [#13778](https://github.com/cosmos/cosmos-sdk/pull/13778) Set Cosmos SDK default endpoints to localhost to avoid unknown exposure of endpoints.
 * (x/auth) [#13877](https://github.com/cosmos/cosmos-sdk/pull/13877) Fix account number handling during `InitGenesis`.
 * (cli) [#14509](https://github.com/cosmos/cosmos-sdk/pull/14509) Added missing options to keyring-backend flag usage 
+* [#15243](https://github.com/cosmos/cosmos-sdk/pull/15243) `LatestBlockResponse` & `BlockByHeightResponse` types' field `sdk_block` was incorrectly cast `proposer_address` bytes to validator operator address, now to consensus address
 
 ### Deprecated
 
diff --git a/client/grpc/cmtservice/util.go b/client/grpc/cmtservice/util.go
index cabde56b08ce..3572a6218533 100644
--- a/client/grpc/cmtservice/util.go
+++ b/client/grpc/cmtservice/util.go
@@ -21,18 +21,18 @@ func convertHeader(h cmtprototypes.Header) Header {
 		EvidenceHash:       h.EvidenceHash,
 		LastResultsHash:    h.LastResultsHash,
 		LastCommitHash:     h.LastCommitHash,
-		ProposerAddress:    sdk.ValAddress(h.ProposerAddress).String(),
+		ProposerAddress:    sdk.ConsAddress(h.ProposerAddress).String(),
 	}
 }
 
 // convertBlock converts CometBFT block to sdk block
-func convertBlock(tmblock *cmtprototypes.Block) *Block {
+func convertBlock(cmtblock *cmtprototypes.Block) *Block {
 	b := new(Block)
 
-	b.Header = convertHeader(tmblock.Header)
-	b.LastCommit = tmblock.LastCommit
-	b.Data = tmblock.Data
-	b.Evidence = tmblock.Evidence
+	b.Header = convertHeader(cmtblock.Header)
+	b.LastCommit = cmtblock.LastCommit
+	b.Data = cmtblock.Data
+	b.Evidence = cmtblock.Evidence
 
 	return b
 }
diff --git a/tests/e2e/client/grpc/cmtservice/service_test.go b/tests/e2e/client/grpc/cmtservice/service_test.go
index 7f181cfb9ccc..48010f625b5a 100644
--- a/tests/e2e/client/grpc/cmtservice/service_test.go
+++ b/tests/e2e/client/grpc/cmtservice/service_test.go
@@ -92,8 +92,8 @@ func (s *E2ETestSuite) TestQueryLatestBlock() {
 	s.Require().NoError(err)
 	var blockInfoRes cmtservice.GetLatestBlockResponse
 	s.Require().NoError(val.ClientCtx.Codec.UnmarshalJSON(restRes, &blockInfoRes))
-	s.Require().Equal(types.ValAddress(blockInfoRes.Block.Header.ProposerAddress).String(), blockInfoRes.SdkBlock.Header.ProposerAddress)
-	s.Require().Contains(blockInfoRes.SdkBlock.Header.ProposerAddress, "cosmosvaloper")
+	s.Require().Equal(types.ConsAddress(blockInfoRes.Block.Header.ProposerAddress).String(), blockInfoRes.SdkBlock.Header.ProposerAddress)
+	s.Require().Contains(blockInfoRes.SdkBlock.Header.ProposerAddress, "cosmosvalcons")
 }
 
 func (s *E2ETestSuite) TestQueryBlockByHeight() {
@@ -105,7 +105,7 @@ func (s *E2ETestSuite) TestQueryBlockByHeight() {
 	s.Require().NoError(err)
 	var blockInfoRes cmtservice.GetBlockByHeightResponse
 	s.Require().NoError(val.ClientCtx.Codec.UnmarshalJSON(restRes, &blockInfoRes))
-	s.Require().Contains(blockInfoRes.SdkBlock.Header.ProposerAddress, "cosmosvaloper")
+	s.Require().Contains(blockInfoRes.SdkBlock.Header.ProposerAddress, "cosmosvalcons")
 }
 
 func (s *E2ETestSuite) TestQueryLatestValidatorSet() {