by Christos Savva.
Thanks for the quick reply.
In the course backup I do include user data. Please see the screenshots below. (Sorry I had to hide the names)
As you can see here the gradebook is empty
But If I go to the activity the grades are there.
Also an update on the issue, because I was trying to figure it out. I noticed that If I try to grade someone and I save his/her grade the grades appear on gradebook but only if I click "grade" and then Save.
But its a lot of work to go and press save for all assigment activities for all students.