Button doesn't stop audio/playhead, even with "Continue Playing the Project" unchecked
I have a button on several projects that is set to Open a URL in a new window. Ideally, when someone clicks on the button, I want the presentation to pause (slide advancement and audio) until they return and press the play button. The "Continue Playing the Project" button is unchecked, but the project continues playing. Is there something else I should be doing in addition to unchecking "Continue Playing the Project"?

Here are the settings for the button. I'm using Captivate 2017 and previewing/publishing HTML5.
Thanks!
