I found the persist behaviour, but the values still don't stick. The page reloads without values. I tried finding documentation, ended up trying multiple settings. I added the bindings to the form field, but still no luck.
Offline (local testing) the form will not submit, neither with correct entry nor without. Online the validation works.
The "Captcha Error" message is showing before a failed submit, even though validate if is applied.
And weirdly, once I uploaded a page, I cannot change it. When I add some test text, it will not show. I have to duplicate the page and upload with a new file name for the changes to stick.