I tried to look more into it and my investigation took me to this repository. I'm actually not sure why it's redirecting to this specific site as there is nothing in the logs, but the redirection is done by this PHP script.

You can edit these redirected pages with:

https://fedoraproject.org/w/index.php?title=SIGs/Join&action=edit

Where should this be redirected to?

Where should this be redirected to?

Nowhere? It should just open the https://fedoraproject.org/wiki/SIGs/Join page. Actually now I see there is:

{{admon/note|This document has moved.|Please go to https://docs.fedoraproject.org/en-US/fedora-join/}}

So that is probably where it should redirect.

Is the {{#fedoradocs: https://docs.fedoraproject.org/en-US/council/fpl/}} responsible for the redirect? I've tried to look through the history who added it there, but the history also behaves funky. Sometimes it redirects, other times it properly displays the diff

https://fedoraproject.org/w/index.php?title=SIGs/Join&diff=667602&oldid=633834

This is the last edit with comment "redirect" from @mattdm, but instead of showing what was changed, I am redirected 😤

Yes, the {{#fedoradocs:... thing is the redirect.

I fixed it to point to join-sig docs.

Does everything look right now?

Does everything look right now?

Yep

Although I still wonder why the wiki history behaves so strange. Several links:

https://fedoraproject.org/w/index.php?title=SIGs/Join&diff=688244&oldid=667602
https://fedoraproject.org/w/index.php?title=SIGs/Join&diff=667602&oldid=633834
https://fedoraproject.org/w/index.php?title=SIGs/Join&diff=633834&oldid=622894

First redirects to the Join documentation, the second to FPL page, the third displays the diff ...

Yeah, thats the plugin. It sees the redirect on the first one and just redirects it. It sees the old redirect from history on the second one and redirects it and there's no redirect yet on the 3rd one in history so you can see it. ;)

Ths redirect plugin is really overeager and shouldn't redirect it you are getting a diff, but oh well. ;(