[OPEN] Screencap previews of submissions in Speedgrader are inconsistently created


Engineers are currently investigating the issue.


When submitting a website URL for an assignment, the preview of the website as it appeared at the time of submission is not consistently displayed in Speedgrader. Our guides state that this is the expected behavior:

"SpeedGrader displays a screenshot of the website at the time of submission."

Expected Behavior

Speedgrader should display a preview of the website associated with the provided URL.


They can either open the link in a new tab or click the link directly to have a preview generate.

Steps to Reproduce

  • Prerequisite: You will need a course with an assignment set to 'online upload' and 'website url' as the type. (Test student has worked for replication)

  1. As a student user, navigate to the assignment, submit a URL for a public website/document.

  2. As a admin/teacher role, navigate to speedgrader for this assignment.

  3. There is a slim (very slim) chance that the preview will show the first submission, however it is not consistently working across every submission.

Additional Info


Known issues indicate notable behaviors that has 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.

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