Lost items in different worlds

[antoilmalvagio]

When I am in one world with objects and enter an arena in another world, I lose the objects in the world from where I executed the command.
Also the objects are moved to the arena world by joining in the waiting room, leaving again and re-entering the arena they disappear completely.
They are two worlds with different inventories

[Redned235]

Can you send across your plugin list? Curious which per-world inventory management plugin you are using.