Currently the site redirects all 404s

https://frameworks.securityalliance.dev/intro/introductiongkjbndg

to

https://frameworks.securityalliance.dev/intro/introduction/

Correct behaviour: serve a 404 page on the broken URL, with no redirect.

Rationale:
404s provide useful information to users and indexers! When you redirect, it's jarring for the users, especially if they followed a link (where did my expected content go?) , makes it hard to detect and fix broken backlinks.

And it makes it more difficult for search engines to correctly index. 404s are a valuable signal, use them well, and put a kitten on the page instead.

You should also be running a 404 checking script. It can help to identify when others are incorrectly linking to you (which you can sometimes fix with a 301), as well as broken internal links.

More: https://support.google.com/webmasters/community-guide/263957590/the-4-types-of-404-should-i-redirect-a-url-that-returns-404?hl=en