Still seeing someone on group 1 list though i blocked them

I believe this is a possible bug but I’m not sure. To explain I had a falling out with one of my ex friends and to make things easier I blocked them. Well I recently had to block someone else and noticed that said ex friend is still listed. I tried unblocking and reblocking said ex friend but their profile wont go away, yet the other persons profile did after I blocked them. I just don’t know what to do.

Just for context, What’s a group 1 list?

If it doesn’t automatically disappear in a few days, and nobody on forums has an idea, maybe reach out to support?