These articles have already been published in the frontend, aren’t they? So, the reviewer(s) can see the names of the authors whenever they look at the article.
I think author names are exposed to the reviewers only after the submission has been assigned to an issue and published. I examined our journal’s archive and reached similar findings with you. But except seldom ones, author names in most of articles are were hidden on OJS 22.214.171.124. Some of these submissions had been declined, but the reviewer can’t see the editorial decision. Therefore it may be due to version difference too.