XML output does not include cross-references in code-fragments

[lukaspj]

Describe the bug
I'm running Doxygen on the Torque3D code-base, and generating an XML file and HTML site.

The HTML site has cross-references in code-fragments:

But XML does not (excerpt):

<para><programlisting><codeline><highlight class="normal">class<sp/>mySubClass<sp/>:<sp/>public<sp/>SimObject<sp/>{</highlight></codeline>
<codeline><highlight class="normal"><sp/><sp/><sp/><sp/>typedef<sp/>SimObject<sp/>Parent;</highlight></codeline>
<codeline><highlight class="normal"><sp/><sp/><sp/><sp/>...</highlight></codeline>
</programlisting></para>

Expected behavior
I expected elements inside the corresponding to the cross-references found in HTML

To Reproduce
MWE with example output included:
doxygen-fragments.zip

Version
Doxygen: 1.8.17 (fetched via apt-get) and 1.9.1 (downloaded from website)
Running inside a Docker container with Ubuntu 20.04 as base

Additional context
I don't mind poking around in Doxygen myself and see if I can solve it myself, but I'm not familiar with the code-base and could really use some guidance. Also my time is limited, so I might not be able to solve it.

[albert-github]

As noted with #8358:

• I didn't see any html files as GENERATE_HTML=NO so how are they generated? (is this from: doxygen/html/classSimObject.html?)
• the xml snippet, from which file is this?
• the html snippets, from which files are these?

[lukaspj]

I updated this issue with a better MWE as well.

[lukaspj]

Tested it in 1.9.1 and it is still an issue

[lukaspj]

Added a MWE as a zip file

[albert-github]

I've just pushed a proposed patch, pull request #8359

[albert-github]

Code has been integrated in master on github (please don't close the issue as this will be done at the moment of an official release).

[lukaspj]

Sounds great, I look forward to the official release!