Engineers are currently investigating the issue.
Description
When you assign a module to single student, and then go back into the assignment settings and assign it back to everyone, the student is no longer assigned to the assignment. This prevents them from being graded and causes errors such as "There was a problem updating the submission" for teachers when trying to grade them.
Expected Behavior
When you assign a module to single student, and then assign the assignment back to everyone, the student should still be assigned to the assignment and you should still be able to grade them.
Workaround
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Go into the edit page of the assignment
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Remove [Everyone] from the 'Assign To' field and re-add them, then Save the assignment.
Steps to Reproduce
Prerequisites: A course with two student enrollments
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Create and publish an assignment assigned to 'Everyone' in a course.
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Create a Module, add that assignment, and assign the module to one student.
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Edit the assignment and replace the one student in the assign to with ‘Everyone’.
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Go to SpeedGrader and see how you can no longer find the student in the list at the top right.
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Go to the gradebook and try to input a grade for that student, and see the error message "There was a problem updating the submission"
Additional Info
LX-2145
Known issues indicate notable behaviors that have been escalated to the Canvas engineering team. Known issues are not a guarantee for an immediate resolution. This document is for informational purposes only and does not replace the Support process. If you are encountering the behavior outlined in this document, please ensure you have submitted a Support case (per your institution's escalation process) so Canvas Support can adequately gauge the overall customer impact and prioritize appropriately.
