In addition to the bug mentioned here with sorting posts in multicommunities https://lemmy.world/post/48917983

I just found another bug with multicommunities, I have one with just 2 or 3 communities making up the multicomunity, and if I browse it I see maybe 10-12 posts, then Summit tells me there is nothing more to show. If I however click on the individual communities I see they got much more content than that.