How to Prevent Submission in Background

Hello,

I’m working with a client who is requesting the following, but I’m unable to figure out how to do this for Contact Form 7:

The form still seems to be submitting in the background. The redirect IS working but here’s what should be happening:

1) When the form submit button is hit it should immediately redirect to our system where WE handle the post action and can show a confirmation/error/etc.

Here’s what IS happening:

1) When the form submit button is pressed it submits the form to our system in the background and THEN redirects to our system without the POST information so we can’t show any errors or confirmation message to the customer because the front-facing side that they get redirected to doesn’t contain any of the form data.

Is there a way to get that form plugin to NOT submit in the background?

I changed the action for the form, but apparently, my client also wants that the form does not submit in the background.
I was wondering if this was possible? If so, how?