Steps to reproduce the issue

Enable 'Search Engine Friendly URLs' in the system settings.

Create two articles (test,test2). In one of the articles create a link to the other article.

e.g. <p><a href="index.php?option=com_content&amp;view=article&amp;id=1&amp;catid=2">test</a></p>

Create a menu item of the type 'Single Article' referencing the article with the link.

Expected result

In Joomla 3 this would result in a SEF friendly URL:

<p><a href="/test/index.php/test2/1-test">test</a></p>

Actual result

In Joomla 4 this results in a non SEF friendly URL:

<p><a href="/test/index.php/test2?view=article&amp;id=1&amp;catid=2">test</a></p>