Font in Whistles Not Changing

Hello,

I use a plug in called Whistles. This allows one to place "boxes" of text or images anywhere in the web page by inserted a shortcode.

The problem I have is that while I recently changed the font of my site, the Whistles are showing the previous font that I was using.

I tried deactivating the plug in, clearing both the server and browser cache, but the old font continues to persist.

You can see an example here. Notice the font in the whistle boxes at the end of the article does not match the font of the main body of the article.

https://www.brightworkresearch.com/saphana/2017/06/29/doesnt-hana-cloud-platform-reviews-g2crowd/