Hello David, Helen,
Thanks for your responses.
I can see from the logs that the student submitted on time, and the scheduled allocation executed three reviewers per submission. Students could only review if they had made a submission, and no late submissions were allowed.
The logs tell me that the student did at one time have an allocation - she viewed three peers' submissions, but did not review them. But on the dashboard
, the Grades Given field for that student is empty except for a single dash symbol i.e. it does not display the names of the three students whose submissions she viewed. She is the only student affected in this way and this hasn't happened before, nor did it happen with any of the other contemporaneous Workshops.
So, still in the dark, I emailed the student and am waiting for a response as to whether (Helen's suggestion) she inadvertently unenrolled and a bit more detail about what she did and what Moodle did.
I am half wondering if a Manual Allocation change was made by somebody in a Tutor role, but I find it unlikely. I am not sure how that would show in the logs, but will experiment.