I use Voyager app for lemmy and default is lemmy.world and under Posts -> Communities -> All, there are many duplicate or reposted posts sometimes after seconds/minutes. I seen many communities with double posts. It makes it very annoying. I’m tired of using block community option. Maybe allow users to block or hide any reposts automatically. You can even just mach post titles and allow only unique titles. This won’t fix it completely, but should eliminate many lemmy auto repost bots.