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[Paolo Oprandi <1831308@xxxxxxxxxxxxxxxxxx>]

Hi again,

I hope it isn't a tricky one. Other LTI tools which will be graded, such
as Turnitin Feedback Studio, send a submission timestamp without having
been graded and the documentation reads,

"Simply add a node called submittedAt to the submissionDetails node...
If included, then it will override any existing submitted_at value on
the submission even when result score or result total score are not
present."

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https://bugs.launchpad.net/bugs/1831308

Title:
  Submission time in Canvas LTI assignment changes to grading time

Status in Mahara:
  Confirmed
Status in Mahara 18.04 series:
  Confirmed
Status in Mahara 18.10 series:
  Confirmed
Status in Mahara 19.04 series:
  Confirmed
Status in Mahara 19.10 series:
  Confirmed

Bug description:
  Tested with Canvas.

  When an LTI assignment is graded, the submission time recorded in
  Canvas switches to the time the portfolio was graded, which causes
  problems when the grading time is past the due time for the assignment
  as the assignment is then marked as late submission even though it had
  been on time originally.

  To replicate:

  1. Set up an LTI assignment in Canvas that has a due date just a few minutes out.
  2. Set the assignment settings as teacher.
  3. Log in as student and submit a portfolio before the due date.
  4. Wait until the due date has passed to grade the assignment as teacher.
  5. Look into the gradebook.
  Expected result: The submission time is the same as displayed when the portfolio was submitted (it can be seen on the Mahara screen in the grading table).
  Actual result: The time switched to the grading time and now the portfolio is marked as late submission.

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