It’s not just visual, posts from these communities don’t show up in the subscribed feed. At least that’s the way it is for me. Sometimes clicking the button again twice helps, but not always. Though at least that adds the communities to the list of subscribed communities.
Edit: Hm, just checked again, and I was wrong. Seems like they are showing up in the subscribed feed. Maybe I got that impression from some other issues my instance had before updating.