This has been an issue I'm noticing with many others running spigot when ever restarting the server most of all mobs and entities are disappearing when starting back up after stopping the server. Mobs like villagers, tamed wolves, tamed horses, most of all friendly mobs have been disappearing even name tagged mobs. Entities like item frames and boats would disappear. I created a forum thread post about the issue and many others have been experiencing the issue. https://www.spigotmc.org/threads/1-14-spigot-mobs-entities-despawning-after-server-restarts.371523/#post-3398060 I don't know why mobs/entities are not staying and are randomly disappearing after every server restart or crash but this is a major issue if it is happening to many others. When not restarting the server all mobs/entities stay until if I do a restart or if there's a crash. None of these issues with mobs/entities disappearing never happened in 1.13.2