I’ve subscribed to a number of communities on other instances. I see their posts in my feed. But when I go to the mirror of that community on my local instance I see a yellow ‘Subscribe Pending’ button. Sometimes I can click that, then re-click ‘subscribe’ twice. Sometimes that will show me as ‘joined’, other times it will show ‘Subscibe Pending’ again.

Is there anything I can do to fix this? What does it mean?