Can't find 3.12.0 maven release

Can't find 3.12.0 release (https://repository.apache.org/content/repositories/releases/org/apache/jena/jena-arq/3.12.0/  - 404 Path /org/apache/jena/jena-arq/3.12.0/ not found in local storage of repository "Releases" [id=releases]), although a github release is already present. 

I see that the previous release (3.11.0) was produced at the same day both in github and in main repository. So Im wondering why such a delay? Is it intentional ?