Update: This issue has now been resolved
We have had a couple of cases recently where lecturers have changed the Post Date on a Turnitin assignment, and the student grades entered in Turnitin have then disappeared.
Although the marks were not irretrievably lost, this inevitably causes some anguish, and leads to a delay in the availability of marks to students.
Turnitin Support have advised us that “Anonymous marking assignment settings will not function correctly when post dates are being moved forward or back”.
So please avoid making any changes to the Post Date if your Turnitin Assignment was set up for anonymous marking.
If, as the Post Date approaches, you are not yet ready to make marks and feedback visible to students, instead of pushing back the Post Date, you could use Adaptive Release to temporarily hide the assignment from students.