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 this on my side using the Form Builder but I could not reproduce the issue.
Here is my screencast video when I was doing the test.
Can you please check if perhaps its just a browser related issue on your side. Try using a different browser. Try an updated Chrome or Firefox browser
Let us know if issue still persist.