App alerts on submit

I have a PDF that requires a number of conditions to be met prior to being able to submit the document. Everything works well save one particular aspect that I hope someone can help me solve.

I have a set of radio buttons that require value prior to submission. If one clicks submit without filling out one of this buttons, they will get an app alert notifying them they need to make a selection.

However, if one makes a radio button selection and the next mouse click in on the submit button, the app alert will pop up as though the radio button isn't filled, requiring another click on the submit button prior to it working correctly.

Is there a way to correct this?

Thanks!