I created a new "article" test post (https://kbin.social/m/longboarding/t/108991), and it was immediately federated to Calckey, so it looks like you were right! Thanks for the help!

Do you know if a bug report is already open for that issue?

The strange is: I was able to search for and find the current article from Calckey. But it still doesn't work with the other posts I created in magazines that I created (for instance it doesn't work with this one: https://kbin.social/m/longboarding/t/12309).

I don't know why the same action gets different results.

But what is strange is that it works for some posts, and doesn't work for some others. For instance I could search for and find the current article.