I managed to get another 2.4.4 platform on another server from other collaborators and this one has the same problem, that is why we classify it as platform bugs.
I advise you so that you are aware of what is happening in version 2.4.4 and we will see a prompt solution to this problem.
The problem is that the tests created in the course are not linked to the gradebook.
Maybe something is wrong in your specific installation, in your specific DB.
(PS: it's not Grand Book, I edited your posts with "Gradebook")