If you go to Code Golf SE main, the only post that is listed on Featured on Meta is the one featured on Mother Meta. But the site actually has two more
featured posts on its own meta. They were showing correctly in the said list before the brief maintenance today.
Tried to check if it has hit other sites too, but couldn't (I checked SO, Math, Puzzling, Code Review but none of them had site-specific featured posts at this moment). Workspace and Literature are showing their own featured posts correctly, so I'm posting this to site-specific meta as well as Mother Meta.