Image map not responsive

Hi
I downloaded your plugin and activated it.
Created an imagemap and inserted it on a page. https://duffygroup.ca/sample-page/
The image and hot spots(blue box at bottom) show up in full desktop mode but disappear when I resize the browser window?

Did miss a step? Can you tell me what I did wrong here?

Thanks
Andrew

https://www.ads-software.com/plugins/responsive-image-maps/