Steps to reproduce:
1. Create any web project and invite Content Publisher, Content Contributor and Content Reviewer to web project;
2. As Creator of Web Project create any content on users sandboxes (on Content Publisher sandbox, on Content Contributor sandbox, on Content Reviewer sandbox), edit it several times and do not unlock it;
3. Log in as the any of invited users, open view details page for unlocked item and verify version history area -> Revert action for versions is available for any user including Content Reviewer. The same behavior is for items which are already part of workflow.
Is this a correct behavior?