I use CodePens in my blog posts and recently I noticed that there is an issue which prevents displaying CodePen embeds correctly. I use Contentful to manage blog posts content. Contentful supports embedding content via Embedly. But for some reason, Embedly fails to show my CodePens in some cases. I couldn’t find the reason nor any way to load them. They just didn’t load. So I decided to stop hitting my head against the wall and make an implementation without Embedly. Read more.