Attachments with special characters broken after space import to Cloud

Summary

Attachments with the acute accent imported from Confluence Server 5.10, are not recognized in Confluence Cloud, being displayed as "Unknown Attachment" on the imported Space.

Steps to Replicate

1. Create a new Space on Confluence Server 5.10
2. Create a new page
3. Insert an attachment that has the accent on its name (i.e. Capture d’écran)
4. Export the space as XML
5. Import in Confluence Cloud
6. Open the page with the attachment

Expected Behavior

The attachment would be display

Actual Behavior

The attachment is displayed as a block with "Unknown Attachment" inside

Workaround

Re-attach the file, or rename and re-attach it to the page