Articles do not show up after being removed from series

Hi,

When removing posts from series, posts are not displayed from the user profile.

To Reproduce

1. create a new posts
2. edit the content of the post
3. add this new post in a (new) series
4. publish the post
5. the post is available from the user profile
6. now create another post
7. add this new post in the same series from the previous post
8. publish the post
9. the latest post of the series is now displayed, but not the old one (normal behavior)
10. remove both posts from the series
11. only the latest post published is displayed (abnormal behavior)

Expected behavior

When a post is removed from a series, it must be displayed like any normal post on the profile page of the user.

Desktop:

• OS, version: OpenBSD and Linux Debian-like
• Browser, version: Brave & Firefox 154.0.1