gpage not working in url

I'm working on building a new form that uses the stripe payment method. During testing I discovered the 'success url' wasn't working right, it was returning to the page that called stripe ... not the page in the 'success url'.

I did some more testing and discovered that I can't use the gpage option in the URL to change pages ... i.e. https://domain.com/index.php?option=com_chronoforms7&chronoform=testing&gpage=end_page
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Does not go to the end_page ... it looks like its going to whatever page is set in the post data ... so if there is no post data, it will go to the first page in the form ... otherwise, it will load whatever page you last went to using the submit button. So ... any idea how to solve this? do I have a settings problem?

Normally this wouldn't be a big deal ... but I can't use Stripe if I can't send the user to the correct success page to finish processing the form ... (i.e. send emails, etc.) ...
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Thanks
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If you want to see it not working on my test form ...
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https://www.rockymountaincpr.com/index.php?option=com_chronoforms7&chronoform=testing&gpage=start_page
https://www.rockymountaincpr.com/index.php?option=com_chronoforms7&chronoform=testing&gpage=stripe_processing
https://www.rockymountaincpr.com/index.php?option=com_chronoforms7&chronoform=testing&gpage=end_page

Hi
It works very well for me (type form=Standalone).
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Note that gpage is not a group page, but a page in the group.
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The syntax that I use in URL from a page of my site:
"/index.php/my-site-page-where- want-to-see-the-formpage?chronoform=form_alias&gpage=page_name"
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Bye