Post History

Questions feed for the Challenges category lacks post links

Here is what the top of the feed for the Code Golf Challenges category looks like currently:

    <?xml version="1.0" encoding="UTF-8"?>
    <feed xmlns="http://www.w3.org/2005/Atom">
      <id>https://codegolf.codidact.com/categories/49/feed</id>
      <title>New Posts - Challenges - Code Golf</title>
      <author>
        <name>Code Golf - Codidact</name>
      </author>
      <link rel="self" href="https://codegolf.codidact.com/categories/49"/>
      <updated>2021-06-22T18:26:30Z</updated>
      <entry>
        <id>#</id>
        <title>Golf a FRACTRAN interpreter</title>
        <author>
          <name>Razetime</name>
          <uri>https://codegolf.codidact.com/users/53310</uri>
        </author>
        <published>2021-04-30T14:35:25Z</published>
        <updated>2021-06-22T18:26:30Z</updated>
        <link href="#"/>
        <summary type="html">...

Note the `<id>#</id>` and `<link href="#"/>`. This causes feed readers to fail to link to the respective post, thus rendering the feed far less useful than it could be.

Now, compare that to the same values in the Sandbox category feed:

    <?xml version="1.0" encoding="UTF-8"?>
    <feed xmlns="http://www.w3.org/2005/Atom">
      <id>https://codegolf.codidact.com/categories/50/feed</id>
      <title>New Posts - Sandbox - Code Golf</title>
      <author>
        <name>Code Golf - Codidact</name>
      </author>
      <link rel="self" href="https://codegolf.codidact.com/categories/50"/>
      <updated>2021-06-20T14:50:35Z</updated>
      <entry>
        <id>https://codegolf.codidact.com/posts/282239</id>
        <title>Recreate the Server Fault logo</title>
        <author>
          <name>Derrick Williams</name>
          <uri>https://codegolf.codidact.com/users/54115</uri>
        </author>
        <published>2021-06-16T10:00:24Z</published>
        <updated>2021-06-20T14:50:35Z</updated>
        <link href="https://codegolf.codidact.com/posts/282239"/>
        <summary type="html">...

Here, both the `<link href=""/>` and `<id>` have reasonable values.

The Power Users Codidact Q&A category feed also looks fine.

It seems to me that whatever is causing this, it is localized to Code Golf's Challenges category.