[Inbox] Instructors should be notified if their reply to student messages are not being sent
This goes along with https://community.canvaslms.com/t5/Idea-Conversations/Canvas-Inbox-Messages-Fully-Obey-Course-Partic...
Once a course has closed, whether by course dates or by term dates, students can continue to reply to an existing message from the instructor.
The instructor receives the reply and if the instructor replies to the student after the course/term end date, the message seems to be sent, is shown in the message thread, but the student actually never receives it.
This causes students to complain that instructors are not answering their messages, and instructors are bewildered because their thread shows that they did reply.
According to Instructure support, this is the intended behavior. Students cannot create a new message after course/term end (and this works - see the screen shot and the little pop-up), but students can still reply to an existing message from the instructor. That the instructor's reply seems to be sent but is actually never received by the student is also their "intended" behavior.
If the course/term end dates are not honored for student replies, then at the very least I think the instructor should receive a pop-up (as the student receives when trying to send a new message after the course/term end) stating their reply is not being sent instead of displaying it in the thread as if it were received by the student.
I did some testing and have some screen shots that show the behavior. In my opinion this is a major bug, especially the instructor portion.