I have another issue on my v2.6 server: I really love the new grading workflow feature, but I'm kind of helpless with the feedback notifications: I don't want the students to get any message when a teacher grades their assignment submission and/or uses the feedback field, unless the workflow state is "released". As we are using the feedback field for typing in error codes of the given submission, wen don't want it to be released over all.
But every time a teacher uses the new grading workflow, gives a grade and types some text in the feedback box, the student receives a notification of given feedback on the assignment. The only way to avoid the message is disabling messages for the whole assignment module in the admin/plugins/messaging configuration - which also disables the (very useful) notifications about succesful submission.
Is that feature or error and any chance to change the beavior?