Can't fork project after deleting fork

Summary

I can't fork a project I'm a reporter for. I previously had a fork and deleted it so I could re-fork the project to get all the newest issues etc with no need to update any branches etc, but when clicking the "Fork" button, it takes me to a 404 page.

Steps to reproduce

1. Fork a repository
2. Delete the fork
3. Attempt to re-fork the project, it doesn't work

Example Project

Here is the project in question that I am unable to fork: https://gitlab.com/open-runescape-classic/core

What is the current bug behavior?

It simply redirects me to https://gitlab.com/ipkpjersi/core-deleted-36375401 which is a 404 instead of allowing me to fork the project. Also, going to https://gitlab.com/open-runescape-classic/core/-/forks and clicking the Fork button produces the same bug:

What is the expected correct behavior?

I expect the project to be forked.

Output of checks

This bug happens on GitLab.com