I appreciate you reaching out to the Community. I was not able to replicate your steps. When I unschedule an email it brings me back to the scheduling page where when I finish previewing it I can close the preview window and still be on the scheduling page. If I edit the email I can just hit the "Continue" button to go back to the scheduling page. Could you share exactly what you click on before it happens? This way we can have a better idea and share it with our developers.