This appears to be a malformed file. I get the following error trying to convert the file.
Unable to convert this document from binary to OOXML form. Incomplete Unicode at end of string
Is this a “real” file, or a synthesized test file?
If you can contact the author of the file, you should ask them to review the creation, especially with regards to strings.
The team has confirmed that the file is malformed/non-conforming to the spec, but since other vendors are apparently ignoring these errors and showing the file as you expect, the team is still investigating with the hope to match that behavior.