#64 Release the mob outside the Lord's world, appear in an instant and disappear.

Release the mob outside the Lord's world, appear in an instant and disappear. After re entering the world, the mob appeared.

Server type: Spigot Server version：1.16.5 MulitWorldPlugins：Multiverse-Core OtherPlungns: WorldGuard，WorldEdit

it is not old version

What is a Lord World ?