Common Bugs in Cursor-Generated Code

Cursor focuses on getting functionality working quickly, which means error handling and edge cases are afterthoughts. It also tends to over-rely on useState for state that should be managed by the URL or server state

Cursor generates code that handles the happy path well but falls apart on edge cases. The most common bugs are unhandled async errors in server actions and API routes — when a database query fails or an external API is down, the app either crashes or shows a raw error message. Form submissions that work once but fail on rapid resubmission due to missing optimistic updates. State management issues where multiple components read from the same data source but don't stay in sync after mutations

Start by running your app through its complete user flow — sign up, use every feature, try edge cases like empty inputs and invalid data. Most Cursor bugs surface when you go off the happy path. Use your browser's developer tools to watch for console errors, failed network requests, and unhandled promise rejections. TypeScript's strict mode will catch many issues at compile time if it's not already enabled.

For async errors, wrap every server-side operation in try/catch blocks and return meaningful error messages. For state bugs, consider whether the state belongs in the URL, in a server component, or in client state — Cursor often defaults to client state when server state would be more appropriate. For data fetching issues, implement proper loading and error states for every data-dependent component.

The best way to prevent Cursor bugs from reaching production: enable TypeScript strict mode, add ESLint rules for common mistakes (no-floating-promises, exhaustive-deps), and write tests for critical user flows. Even basic smoke tests catch the majority of issues.