React Form Input Values Not Updating or Showing Stale Data

1. Missing onChange handler on input
2. Value prop without onChange (making input read-only)
3. Using defaultValue instead of value for controlled input
4. State not updating due to event handler issues
5. Keys causing component remounts and state reset

Implement controlled input with state:

const [email, setEmail] = useState('');

return (
   setEmail(e.target.value)}
    placeholder="Enter email"
  />
);

Or use uncontrolled input with useRef for file inputs or simple cases.