Hello @wordyad ,
I hope you are doing well.
I was able to successfully submit the form located at the URL you shared and tested it multiple times without any issues. Please refer to the following screenshot for reference.
Screenshot: https://prnt.sc/sdN-Uz3VDHXr
Could you please check whether the issue is still occurring on your end? If it does persist, the problem may be specific to your local environment. In that case, I recommend trying again using a different browser or testing in an incognito/private browsing window.
Please let us know how it goes.
Kind Regards,
Fida Al Hasan