In a pro form with steps, the radio type selectors are not saved in the database that registers the forms. I have 5 radio-type questions with 4 options and at the last one a text-type field and an email and only the text and the email are saved.
Hey 
that’s a known bug and already fixed locally. Will be included to the next release. If you need the fix more urgently, feel free to send me admin access. 