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 test it on your form https://www.jotform.com/52402099982158 but I could not reproduce the same issue at this time. I could create new item/product in the Payment field.
Can you please retry. I suggest you try refreshing your browser also or if available test also using another browser i.e. Chrome or Firefox browser.
Let us know if issue is not resolve.