If any field on the volunteer application is not filled out, or is formatted incorrectly the same page will continue to reload instead of going through when the user clicks 'Submit'. The error messages that show the applicant which fields they need to fix are not showing up.
We are aware of this issue and are currently working to correct it.
In the meantime, make sure that they know that if there are any extra spaces in the fields - before the first character or after the last character (usually if they copy/paste the info), the form will not go through. They will know when it does as they will land on a 'Thank You' page and they will receive a confirmation email.