Do you think this might be a roles issue? I noted that instructors no longer see the "upload a file" form in assignments unless you set a role permission for that (I was actually happy about that, because a lot of people misunderstood and thought they were uploading a file for students to view).
Maybe the same thing is happening in workshop. Did you log in as a student to see if the view changed? You might take a look at the instructor roles for workshop and see if you need to tweak something.