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With which form you are having this issue with? I did test your last edited form and I am not able to replicate the issue you are having. I was able to submit your form successfully. Please check the screenshot below:
Have you embedded your form in any webpage? Please share the webpage URL and we will take a look.
You may also like to test your form again and get back to us if the issue persists.
We will wait for your response.
JotForm Support Manager
This issue should be solved now. I just submitted a test with no problem. Let us know should the issue continue in your end.