What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
I checked and test your form https://www.jotform.com/61477497499175 and I was able to see the Preview Before Submit widget working properly.
Here is the video of my test:
Can you please test again. Try also using a different browser. Perhaps its just a browser cache issue on your side.
Let us know if issue remains.
Thanks. Now we can move forward to embed it.