Grade and feedback not always shown
Whenever the script gives a grade with long feedback, the feedback disappears and is not shown. Moreover, in this case, the grade cannot be seen on the groups page but only on the submissions page.
See https://submit.tudelft.nl/group/17296 and https://submit.tudelft.nl/assignment/1047/submissions (submission 5819)
Preferably, feedback should also be stored as MySQL Text and not as MySQL Varchar to support feedback of over 255 characters.