Forms: Radio Buttons required

Hi,

i tried to implement two radio buttons in a form. One of those have to be chosen. But if i put a * for required into the shortcode, i cannot send the form. An error message comes up and sais, it’s required. This seems to be a bug, because radio button means, you cannot take both, you have to decide for one (or did I do something wrong?)

Thanks

Are both options in one [tag]?
Then it’s impossible to select both and the check should working.