@spanier865 that's an awesome question.
In short you'd like them to continue their journey where they left it. In short this can not be done out of the box at this moment. But a great feature request @Taylor Tarpley.
You could however change the function of the popup to close the popup (share the incentive on the thankyou part of the popup). This way the person stays on the same page.
The alternative is to use another tool for this or built it out yourself and add event data about the signup page so you can use it later in the flows.
Omar Lovert // Polaris Growth // Klaviyo Master Platinum Partner
We help with e-commerce growth through CRO, Klaviyo and CVO