diff --git a/apps/ui/src/components/views/board-view/hooks/use-board-actions.ts b/apps/ui/src/components/views/board-view/hooks/use-board-actions.ts
index 89446fc5..75d49030 100644
--- a/apps/ui/src/components/views/board-view/hooks/use-board-actions.ts
+++ b/apps/ui/src/components/views/board-view/hooks/use-board-actions.ts
@@ -1092,8 +1092,20 @@ export function useBoardActions({
 
   const handleDuplicateFeature = useCallback(
     async (feature: Feature, asChild: boolean = false) => {
-      // Copy all feature data, only override id/status (handled by create) and dependencies if as child
-      const { id: _id, status: _status, ...featureData } = feature;
+      // Copy all feature data, stripping id, status (handled by create), and runtime/state fields
+      const {
+        id: _id,
+        status: _status,
+        startedAt: _startedAt,
+        error: _error,
+        summary: _summary,
+        spec: _spec,
+        passes: _passes,
+        planSpec: _planSpec,
+        descriptionHistory: _descriptionHistory,
+        titleGenerating: _titleGenerating,
+        ...featureData
+      } = feature;
       const duplicatedFeatureData = {
         ...featureData,
         // If duplicating as child, set source as dependency; otherwise keep existing
diff --git a/apps/ui/src/components/views/board-view/hooks/use-board-persistence.ts b/apps/ui/src/components/views/board-view/hooks/use-board-persistence.ts
index d0da2d5c..d3004f74 100644
--- a/apps/ui/src/components/views/board-view/hooks/use-board-persistence.ts
+++ b/apps/ui/src/components/views/board-view/hooks/use-board-persistence.ts
@@ -132,6 +132,13 @@ export function useBoardPersistence({ currentProject }: UseBoardPersistenceProps
         const api = getElectronAPI();
         if (!api.features) {
           logger.error('Features API not available');
+          // Rollback optimistic deletion since we can't persist
+          if (previousFeatures) {
+            queryClient.setQueryData(queryKeys.features.all(currentProject.path), previousFeatures);
+          }
+          queryClient.invalidateQueries({
+            queryKey: queryKeys.features.all(currentProject.path),
+          });
           return;
         }