diff --git a/internal/gatewayapi/backendtrafficpolicy.go b/internal/gatewayapi/backendtrafficpolicy.go
index a339d3b8c8d..b42b4f7d283 100644
--- a/internal/gatewayapi/backendtrafficpolicy.go
+++ b/internal/gatewayapi/backendtrafficpolicy.go
@@ -281,7 +281,11 @@ func (t *Translator) processBackendTrafficPolicyForRoute(
 			ancestorRef := getAncestorRefForPolicy(mapKey.NamespacedName, p.SectionName)
 			ancestorRefs = append(ancestorRefs, &ancestorRef)
 
-			parentRefCtxs = append(parentRefCtxs, GetRouteParentContext(targetedRoute, p, t.GatewayControllerName))
+			// Only process parentRefs that were handled by this translator
+			// (skip those referencing Gateways with different GatewayClasses)
+			if parentRefCtx := targetedRoute.GetRouteParentContext(p); parentRefCtx != nil {
+				parentRefCtxs = append(parentRefCtxs, parentRefCtx)
+			}
 		}
 	}
 
diff --git a/internal/gatewayapi/envoyextensionpolicy.go b/internal/gatewayapi/envoyextensionpolicy.go
index c0322b943e5..2284e5d3c5b 100644
--- a/internal/gatewayapi/envoyextensionpolicy.go
+++ b/internal/gatewayapi/envoyextensionpolicy.go
@@ -475,7 +475,12 @@ func (t *Translator) translateEnvoyExtensionPolicyForRoute(
 	parentRefs := GetParentReferences(route)
 	routesWithDirectResponse := sets.New[string]()
 	for _, p := range parentRefs {
-		parentRefCtx := GetRouteParentContext(route, p, t.GatewayControllerName)
+		// Skip if this parentRef was not processed by this translator
+		// (e.g., references a Gateway with a different GatewayClass)
+		parentRefCtx := route.GetRouteParentContext(p)
+		if parentRefCtx == nil {
+			continue
+		}
 		gtwCtx := parentRefCtx.GetGateway()
 		if gtwCtx == nil {
 			continue
diff --git a/internal/gatewayapi/securitypolicy.go b/internal/gatewayapi/securitypolicy.go
index 4dca669f882..f39b408ddf6 100644
--- a/internal/gatewayapi/securitypolicy.go
+++ b/internal/gatewayapi/securitypolicy.go
@@ -647,7 +647,12 @@ func (t *Translator) translateSecurityPolicyForRoute(
 	parentRefs := GetParentReferences(route)
 	routesWithDirectResponse := sets.New[string]()
 	for _, p := range parentRefs {
-		parentRefCtx := GetRouteParentContext(route, p, t.GatewayControllerName)
+		// Skip if this parentRef was not processed by this translator
+		// (e.g., references a Gateway with a different GatewayClass)
+		parentRefCtx := route.GetRouteParentContext(p)
+		if parentRefCtx == nil {
+			continue
+		}
 		gtwCtx := parentRefCtx.GetGateway()
 		if gtwCtx == nil {
 			continue