Strange strings getting used as <title> for episodes in Podcast XML

[gityopr]

I've been wrestling with this trying to figure out how to facilitate testing and reproduction. Many files result in strange podcast episode names.

I have an audiobook file in my dir2cast podcast folder, the file has correct ID3 tags but the podcast episode produced by it has the title "End Credits". I've put that file on wetransfer here (the book is public domain): https://we.tl/t-yRIimxtSTo

According to MP3Tag and Musicbrainz Picard, the file has 7 fields with content: Title, Artist, Album, Year, Genre, Comment, and Album Artist. None of those fields contain the words "End Credits".

The XML file contains this for the relevant file:

<item>
<itunes:author>Murray Bookchin, Todd McGowan - afterword</itunes:author>
<itunes:duration>6:30:23</itunes:duration>
<itunes:summary>End Credits</itunes:summary>
<itunes:subtitle>Murray Bookchin, Todd McGowan - afterword</itunes:subtitle>
<itunes:image href="http://[website]/The%20Philosophy%20of%20Social%20Ecology.jpg"/>
<title>End Credits</title>
<link>http://[website]/The%20Philosophy%20of%20Social%20Ecology.m4b</link>
<pubDate>Thu, 04 Jul 2024 01:08:43 +0000</pubDate>
<description>
<![CDATA[ End Credits ]]>
</description>
<image>http://[website]/The%20Philosophy%20of%20Social%20Ecology.jpg</image>
<enclosure url="http://[website]/The%20Philosophy%20of%20Social%20Ecology.m4b" length="372016940" type="audio/mp4"/>
</item>

This M4B file does have chapters with chapter titles, but I'm not sure how to interact with them or tell Dir2Cast to ignore them. Where did the contents of itunes:summary and <title> come from? Is there any way to override this?