It shows that there are 12 posts, but I'm unable to see them. It's a local community that I moderate. I tried to make a post. There were no errors. I'm even able to access the post here but it's not visible in the community. The post doesn't show up on my profile either. But there are some posts visible if I look at them from another instance e.g. through lemmy.world. The linked posts still doesn't show up, but could be due to delay in federation.

Edit: Just checked, this post doesn't show up on my profile either. But if I make a comment on another instance, it does show up on my profile. Weird.

UPDATE: It was happening due to a very stupid reason. I had unchecked "show read posts" in my settings. I do think that this isn't intended, since it should only affect the homepage/feed/whatever it's called here and not the profile pages and communities.