Front end form refreshes page even tho Ajax submession enabled

I have created a Front End form from Metabox custom fields and added it to a Bricks Popup template

I have a required field on the form

When I submit the form without completing the required field I get the 'Please correct the errors highlighted below and try again' message but the page reloads anyway with the /?rwmb-form-submitted=f0xxxx querystring and then reports that the from has been submitted.

It seems as though the form is not being submitted by ajax vent though that is set within the Bricks Submission Form settings