Some time ago I made a test community. The community has "no posts": 
But it actually has two, this one is gone from the post list but it exists somewhere: https://lemmy.ml/post/44707
And this one: https://lemmy.ml/post/44682 (the latest mod action I see in the modlog was supposed to restore it but it still doesn't appear).
The sidebar looks like this: 
"removed by mod" next to the join button, "Create a post" button disabled.
If I try to create a post using the community ID like this (copying the link from the disabled button): https://lemmy.ml/create_post?community_id=17127
I get this duplicate error ("deleted by creator" "deleted by creator"): 
The community is this: https://lemmy.ml/c/___
Is this a bug? Something removed by the admins? Maybe removed by me and I forgot?
I forgot I had created that since it doesn't appear in my user page: 
But I was recently able to log in using the lemmur app (writing my username like \___) and I saw it there so I remembered and decided to check.
Edit: The comments list can display comments: https://lemmy.ml/c/___/data_type/Comment/sort/Active/page/1 (unlike the posts list).