PopUp Pro Seems to be showing up after site search

We've recently noticed that if we search our site, the pop up modal shows up and cannot be closed. Running WP 4.7.1 - PopUp Pro 4.8.0.0 - we've disabled the one pop-up we have created which doesn't change the issue. If we disable the plugin there is no issue with the empty pop-up modal showing up after we perform a search.