Community blocking: memes@lemmy.ml doesn't appear in search

I'm trying to block posts from !memes@lemmy.ml as a community.

When I go to the appropriate settings dialog, and try searching for "memes@lemmy.ml" it returns communities such as "wholesomememes@lemmy.ml" and "animemes@lemmy.ml"

Therefore I can't select "memes@lemmy.ml" to block.

I think the search is not including the blank prefix case.