As I wrote before: "Page with CRED form just reloaded with _tt param: hidden link"
So, it is just reloaded with new param "_tt". With filled fields. And then I submit form again, it create a new post and redirect to it. The issue is why it is not done it from first submit? And not create a new post by first form submit...
Not the only. You could try entire process by that link and you will find that some of next forms also not processed after first attempt.
E.g. second form on the main page has the same issue (hidden link)
By the way, what is the param '_tt' means? For all forms it added to page url for reloading.
I'm not able to create the duplicator package on your site and it seems you host is blocking the other attempts.
However enabling AJAX on the form resolves the issue.
So you can work around this by using the ajax submission.
Yes, AJAX helps. Not perfect solution due to additional delay for users and some design issue, but it works for now.
I'm not sure about close this ticket due to definitely some bug at non-AJAX post submission with redirect. So, it's up to you how to process it.
Anyway, thanks for your help and current solution.
This actually isn't a replicable bug atleast. I highly suspect its due to some conflict with theme/server/plugin . If I was able to replicate the issue here locally then I would be able to escalate to our team for fixing but i'm not able to.
Since the AJAX solution works fine there isn't much else that I can advise on. Also i'm not able to create a copy of your site due to your hosts restrictions on cloning plugins.