diff --git a/src/stores/useModelStore.ts b/src/stores/useModelStore.ts
index 11182e9..8970a0c 100644
--- a/src/stores/useModelStore.ts
+++ b/src/stores/useModelStore.ts
@@ -524,7 +524,9 @@ export const useModelStore = create<ModelStore>((set, get) => ({
   toggleElementSelection: (key) => set((s) => {
     const next = new Set(s.selectedElementKeys);
     if (next.has(key)) next.delete(key); else next.add(key);
-    return { selectedElementKeys: next, visibilityNonce: s.visibilityNonce + 1 };
+    const newNonce = s.visibilityNonce + 1;
+    console.log('[Store] toggleElementSelection', { key, size: next.size, newNonce });
+    return { selectedElementKeys: next, visibilityNonce: newNonce };
   }),
   clearElementSelection: () => set((s) => ({ selectedElementKeys: new Set(), visibilityNonce: s.visibilityNonce + 1 })),
   hideSelectedElements: () => set((s) => {