fix: smart account signing checktx error (#8665)

* fix: smart account signing checktx error

* chore: add changelog entry

(cherry picked from commit 51cdc5c)

CHANGELOG.md

@@ -69,6 +69,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * [#8494](https://github.com/osmosis-labs/osmosis/pull/8494) Add additional events in x/lockup, x/superfluid, x/concentratedliquidity
 * [#8543](https://github.com/osmosis-labs/osmosis/pull/8543) Add OTEL wiring and new configs in app.toml
 * [#8566](https://github.com/osmosis-labs/osmosis/pull/8566) Minor speedup to CalcExitCFMM shares
+* [#8665](https://github.com/osmosis-labs/osmosis/pull/8665) fix: smart account signing checktx error
 
 
 ## v25.2.1

x/smart-account/authenticator/authentication_request.go

@@ -245,8 +245,8 @@ func GenerateAuthenticationRequest(
 		AuthenticatorParams: nil,
 	}
 
-	// We do not generate the sign bytes if simulate is true
-	if simulate {
+	// We do not generate the sign bytes if simulate is true or isCheckTx is true
+	if simulate && ctx.IsCheckTx() {
 		return authRequest, nil
 	}