This is the build of 7.1.0 that still has the problem.
Version Tag.odt (application/vnd.oasis.opendocument.text), 208.55 KB, created by John Lockridge on 2020-12-16 22:42:12 UTC
(hide)
 
Creator: John Lockridge
Created: 2020-12-16 22:42:12 UTC
Size: 208.55 KB

Attachment is not viewable in your browser because its MIME type (application/vnd.oasis.opendocument.text) is not one that your browser is able to display.

Download the attachment.

Actions: View
Attachments on bug 138924: 168242 | 168245