Media cannot be attached in Conversations

This behavior has been resolved and deployed to the production environment as of 8/27/25.
Description
In the Inbox, attempting to attach media to a conversation message fails. After recording or uploading media and selecting Save Media or Submit the Upload Media modal closes, but the media is never uploaded or attached to the message.
Expected Behavior
The media should appear in the draft and the message should send successfully with the media included.
Workaround
Attach the media as a file using the paperclip icon
Steps to Reproduce
Prerequisites: A course with two teachers enrolled.
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As one of the teachers open the Inbox and compose message
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Select the media icon at the bottom of the compose modal and attempt to either record or upload media to add to the message.
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Send the message and note that the media is not attached.
Additional Info
VICE-5492
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.