This question has been answered by Jako. See the first response.
Anything in the error log?No, nothing!
Is redirect after email in the list?Yep! Here's the call:
[[!FormIt? &hooks=`recaptchav2,spam,email,redirect` &emailTpl=`ContactUs_Email` &emailUseFieldForSubject=`1` &emailTo=`[email protected]` &emailFromName=`[[+name]]` &store=`1` &redirectTo=`36` &validate=`name:required, phone:required, email:email:required, subject:required,` ]]