Gitlab Pages is not refreshing the public folder

I created this page in gitlab.com:

https://franferri.gitlab.io/

I added a custom domain to it:

https://franferri.io

When I access the page https://franferri.gitlab.io/ I see properly the page as expected.
When I access the page https://franferri.io I see code that I deployed 2 years ago in another repository. (Up then I also had to cut a tt to fix that very same issue)

Why te public folder in the backend side don’t refresh?
Why the generated ssl has *.gitlab.io as emitter when I access to the custom domain?

Any help much appreciated.