Yup it was for the page that was embedded with the contact form. However even without typing in any data, it still pops out with the leave page warning.
I think it would be nice if the pop up appears only when it detects data has been typed in. This is because some users may just be checking the contact page for contact information and not necessarily to send a message through the contact form. Just an idea.
Appreciate the plugin and the very prompt replies. Thanks for the great work.