Table showing differently on blogposts

Hey forum

I run the website https://find-internet.dk/. I have just installed the plugin “Easy Table of Content” for all my pages and my blog.

For my blog posts, I experience the plugin work differently on the three posts. On two of them, it shows the right way, but on the last one, it shows on the “snippet” – see here: https://find-internet.dk/blog/.

I have tried removing the cache (multiple times), re-uploading the blog post etc etc.

What could be the reason behind this?

The page I need help with: [log in to see the link]