diff --git a/CHANGELOG.md b/CHANGELOG.md
index a633c7dbec..45e9a3224d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -51,6 +51,10 @@ Every module contains its own CHANGELOG.md. Please refer to the module you are i
 * (runtime) [#21704](https://github.com/cosmos/cosmos-sdk/pull/21704) Move `upgradetypes.StoreLoader` to runtime and alias it in upgrade for backward compatibility.
 * (sims)[#21613](https://github.com/cosmos/cosmos-sdk/pull/21613) Add sims2 framework and factory methods for simpler message factories in modules
 
+### Bug Fixes 
+
+* (sims) [#21952](https://github.com/cosmos/cosmos-sdk/pull/21952) Use liveness matrix for validator sign status in sims
+
 ### API Breaking Changes
 
 * (types/mempool) [#21744](https://github.com/cosmos/cosmos-sdk/pull/21744) Update types/mempool.Mempool interface to take decoded transactions. This avoid to decode the transaction twice.
diff --git a/x/simulation/mock_cometbft.go b/x/simulation/mock_cometbft.go
index c9572dd469..691494c64f 100644
--- a/x/simulation/mock_cometbft.go
+++ b/x/simulation/mock_cometbft.go
@@ -151,10 +151,13 @@ func RandomRequestFinalizeBlock(
 			signed = false
 		}
 
+		var commitStatus cmtproto.BlockIDFlag
 		if signed {
 			event("begin_block", "signing", "signed")
+			commitStatus = cmtproto.BlockIDFlagCommit
 		} else {
 			event("begin_block", "signing", "missed")
+			commitStatus = cmtproto.BlockIDFlagAbsent
 		}
 
 		voteInfos[i] = abci.VoteInfo{
@@ -162,7 +165,7 @@ func RandomRequestFinalizeBlock(
 				Address: SumTruncated(mVal.val.PubKeyBytes),
 				Power:   mVal.val.Power,
 			},
-			BlockIdFlag: cmtproto.BlockIDFlagCommit,
+			BlockIdFlag: commitStatus,
 		}
 	}