URL trouble with renaming blog post slug and creating new page with same slug

This is a blog post: https://www.domain.com/absolutely-own.
This is a new page (not a blog post): https://www.domain.com/absolutely

The blog post used to be called https://www.domain.com/absolutely, but I wanted this same URL for a new page instead, so I changed the slug to /absolutely-own.

Problem:
https://www.domain.com/absoluteLY (with capital letters LY at the end) redirects to https://www.domain.com/absolutely-own
https://www.domain.com/absolutely works fine.
I want https://www.domain.com/absoluteLY to redirect to https://www.domain.com/absolutely as one would assume.

I don’t understand what’s going on! How can I fix this?