Google Search Console (Mobile Usability) is incorrectly rendering page content too narrow, thus triggering the "Text is too small to read" error

All the articles on our blog are triggering the "Text too small to read" error in Google Search Console (Mobile Usability).

We were not able to validate this issue upon checking ourselves --

However, when view the same tested page in Google Search Console and view the screenshot, we see that the Googlebot smartphone rendering is compressing the content to about 1/3rd of the viewport --

Here is the source code related to the example in the screenshots --

https://jsbin.com/munofohoke/edit?html,js,output

<a class="jsbin-embed" href="https://jsbin.com/munofohoke/embed?html,js,output">Finding Corporate Philanthropy a Challenge? Let This Primer Guide You | flevy.com/blog on jsbin.com</a><script src="https://static.jsbin.com/js/embed.min.js?4.1.8"></script>

Any idea on how we can fix this?

The source code is the full webpage, as we are unable to replicate the Google Search Console issue locally. We are using Wordpress and the Canvas WooTheme.

Thanks.