Workflow does not work correctly I create a workflow for the content type "Article":


creation -> draft
draft -> expert review
expert review -> head review
head review -> publish


When authors create an article node, and send it for "expert review," they can still view and edit the node but "expert review" cannot view the node.

Is there any bug or trick for Workflow?
Edit your Workflow again (after you created the states) and scroll down to the bottom to 'Access control' section. In there you can set permissions for each state.

You can also look at the Workflow Fields module if you want to set access to individual CCK fields.