Tags should be published with the document

Expected behaviour is :

When you publish a document, the tags are copied from the work document to the published document. You can then remove useless tags from either version of the document (work version or published version) without affecting the other one. In case of republication of the document, the tags from the previously published version and the newly published version are merged so you don't loose any previous or preparatory categorization.

But when I publish a tagged document, the proxy is not tagged.
If I click a second time on the Publish here link, then the document in the section is tagged.