Media files in New Quiz questions show 'Refused to Connect' error

[#1]

This behavior has been resolved and deployed to the production environment as of 7/02/25.

Description

When "One Question at a Time" is enabled and "Allow Backtracking" is disabled, media files with an instfs_id and access_token show a "Refused to Connect" error for students.

Expected Behavior

Media files should load for all users.

Workaround

Disable “One question at a time” option or enable “One question at a time” option and Allow Backtracking.

Steps to Reproduce

Prerequisites: A new course with new quizzes enabled.

1. Create a new quiz with questions where you have a video or audio file uploaded from your computer or recorded in browser using upload/record.

2. Wait for the background job which converts links to inst-fs style links to update the media_attachments_iframe link in the iframe to add the instfs_id and access_token parameters to the link.

3. Under quiz settings.

   1. enable "One Question at a Time"

   2. disable Allow Backtracking.

4. Act as student or use preview.

5. Notice that audio and video file return 'Refused to Connect' error

Additional Info

QUIZ-15553

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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.

[HeatherAhern]

The status of this known issue has been updated to: Completed