Pinia filter label stays stale after a store update

What you’ll build / What this tests

This premium Vue debug scenario focuses on Pinia filter label stays stale after a store update. Read the failure signals, choose the highest-signal debug order, and defend the fix plus regression guard.

Learning goals

• Why does the filter label stay stale?
• What would you check first? Put the best three at the top.
• Which changes belong in the actual fix?
• What is the best guardrail for this bug?

Key decisions to discuss

• Separate symptom from root cause before touching code.
• Choose the smallest debug step that removes the most ambiguity.
• Prefer a durable fix over a UI-only patch.
• Define the regression guard you would add after the fix.

Evaluation rubric

• Strong answers prioritize evidence instead of guessing.
• Good debug order reduces search space quickly.
• The final fix should match the actual failure mode.
• A senior answer closes with a guardrail or test plan.

Constraints / Requirements

• Vue 3 storefront using Pinia. The component reads the current filter and result count from a…
• The list reacts, but the selected filter pill stays old
• A page reload or remount suddenly shows the right value
• The component destructures Pinia store state directly

Current component setup

const store = useCatalogStore();
const { selectedFilter, resultCount } = store;

const filterLabel = computed(() => {
  if (selectedFilter === 'sale') return 'On sale';
  if (selectedFilter === 'new') return 'New arrivals';
  return 'All';
});

Common pitfalls

• Jumping to the fix before proving the root cause.
• Treating every symptom as equally important.
• Stopping at the first plausible explanation.
• Skipping the regression guard after the fix.

Related questions

• Draft note jumps to the wrong row after adding at the topFree