How do I get Captcha to reappear in my registration form if an error was detected after submission? I'm using Drupal 7 and have added an image Captcha as part of the registration process. The Captcha works just fine but if the form is submitted with an error, it no longer appears with the rest of the form when the registration page reloads. How do I make sure it always reappears? Thanks.
It's in module settings. Under Persistence , you can set CAPTCHA to appear:


always,
once per form,
once per session.


It used to default to always, but as far as I remember there was an issue to change default. Probably now it defaults to once per form or once per session. It should be enough to manually change it to always.