Pop up will not close after form submitted

I am using Pop Up Pro on this page: http://www.rdvsystems.com/visualize-quickly-effectively/

After the form is filled out and submitted, the pop up “pops up” again instead of closing. I have tried this plugin on 2 different wordpress websites and it has the same problem on both.

In the settings, I have set the “Closing pop up conditions” to: “Always close after form submit”

This does not work.

I am using WordPress version 4.7.2

My theme is the Themeco X Theme