This is a bug report.
The redirect to URL doesn’t work when the form contains required answers that are part of a paged-section.
Steps to reproduce the issue:
Create a form that contains pages. User the answer for first question (for example a radio input) to determine if the next page should be served to the user. Answer option A does not serve the next page, answer B would serve the next page. On the second page add a field that is required to answer. In the confirmation settings create two confirmations that will be used if the user answers with either A or B to the first radio-question. For answer A set a redirect to a URL. For answer B leave the default confirmation settings (on-screen message).
Result:
The redirect doesn’t work if you answer the first question with value A. If you make the fields on the second page optional (not required) then the redirect works.