diff --git a/apps/sim/app/w/components/workflow-preview/workflow-preview.tsx b/apps/sim/app/w/components/workflow-preview/workflow-preview.tsx
index 0b3b5f0d22..9483f1fb5b 100644
--- a/apps/sim/app/w/components/workflow-preview/workflow-preview.tsx
+++ b/apps/sim/app/w/components/workflow-preview/workflow-preview.tsx
@@ -120,7 +120,7 @@ export function WorkflowPreview({
           blockState: block,
           isReadOnly: true, // Set read-only mode for preview
           isPreview: true, // Indicate this is a preview
-          showSubBlocks,
+          subBlockValues: block.subBlocks || {}, // Use empty object as fallback
         },
       })