diff --git a/frontend-react/src/components/CanvasArea.tsx b/frontend-react/src/components/CanvasArea.tsx
index d0a3848..bed1174 100644
--- a/frontend-react/src/components/CanvasArea.tsx
+++ b/frontend-react/src/components/CanvasArea.tsx
@@ -739,7 +739,8 @@ export function CanvasArea({ store: providedStore }: CanvasAreaProps) {
     }
 
     const isAlreadySelected = selectedSet.has(ref);
-    const dragCandidates = isAlreadySelected && selectedRefs.length > 1 ? selectedRefs : [ref];
+    const explicitGroupDrag = event.altKey;
+    const dragCandidates = isAlreadySelected && selectedRefs.length > 1 && explicitGroupDrag ? selectedRefs : [ref];
 
     if (!isAlreadySelected || selectedRefs.length !== dragCandidates.length) {
       store.actions.setSelection({