I have this SCORM file prepared with iSpring. All works fine, most students get their grades, however, Gradebook overrides a few of the students grades and the revised grades turn into zero. I prepare this kind of SCORM packages every week and there are always a couple of students (out of ~100) with whom I experience the same problem.
Below is a screenshot from Grade history - Graders column shows student him/herself
Couldn't attach the SCORM package due to size restriction, you can access from the link below.
https://sites.google.com/view/scormfile
Anyone who can identify and help with the problem?
Thank you in advance!