GitHub pages site, no matter what, redirects to custom domain, even when disabled

Hi
Recently I’ve been making a simple website and I added a custom domain and, for a while it, it worked. But after committing some code, it broke. So I just went straight to the nuclear option and deleted the repository. I re-committed the code and set up pages, without setting up the custom domain as I was still working on the website. When I went to go to the repo’s *.github.io page it went to my custom domain.

I’m really hoping someone on here is able to give me a hand,
Thanks.

did you change your username ?

your GitHub Profile is 404