Feedback setting is not saved when previous feedback is either noFeedback or Only Release Student Score is chosen.
Here is how to reproduce it:
1. Choose nofeedback and save.
2. Edit setting again and choose any other feedback except 'noFeedback', check a few checkboxes under Release Questions and the following. Save.
3. Go back to setting again, and you will see checkboxes that checked are not saved under Release Questions.
Here is another one to reproduce:
1. Choose any feedback except nofeedback.
2. Choose Only Release Student's Assessment Scores and save.
3. Edit setting, choose Release Questions and the following and check a few checkboxes and save.
4. Go back to setting and you will see checkboxes are not checked.