Describe the bug

I am scraping the site https://magdalene.substack.com/archive. Although it does have a feed, there is no way to differentiate between paid and free content so I have included the following:
xpath for finding news items: //div[@Class='portable-archive-list']/div/div/div/div
xpath for item tags: concat("#paid_is_", boolean(descendant::svg[contains(@Class, 'lucide lucide-lock ')]))
This assigns #paid_is_true to articles that are paid, and #paid_is_false to articles that are free. It works as expected.

If I search on #paid_is_true, or use it as a user query, the paid articles are found correctly. However, if I put the same tag in Mark as Read, all of the articles come through. Is there some way to generate a tag via scraping and have it searched on when loading articles?

To Reproduce

Input feed as described.

Expected behavior

Paid articles should be marked as read but they are not. Additionally, I have tired negating the #paid_is_false tag. This marks all as read, which seems to suggest that FreshRSS does not see these tags.

FreshRSS version

1.24.3

Environment information

• Database version: [e.g. Mysql 5.7, SQLite]
• PHP version: [e.g. PHP 8.1]
• Installation type: [e.g. Docker, Docker image source, git, Yunohost]
  -Web server type: [e.g. Apache, nginx]
• Device: [e.g. iPhone13]
• OS: [e.g. Ubuntu 22.04, Win10, MacOS14]
• Browser: [e.g. Firefox 124]

Additional context

No response