This is unfortunately not a Memmy issue but a server issue with your instance :(
I’m actually seeing this issue on other apps too, so I’m thinking it is definitely an API issue. WefWef appears to work, but they might be getting the info from a cache or from another API endpoint. Going to keep looking into it.
Found this github.com/LemmyNet/lemmy/issues/3515
Wondering if there were some breaks around communities as well.