Unfollow user not working

I started following a developer, but after a while, I decided to unfollow them. But, I still see their activity on my feed. I tried turning off any ad block extensions, I tried following, then unfollowing again.

This is nothing against the developer, I just decided to unfollow him.

Nevermind. I realized I had a misunderstanding on how the feature works. If you follow someone and they have activity on day one, then on day 2 you unfollow them, the day 1 activity will still be displayed.