I think I found a bug: If someone's on world X and they join world Y, world Y's config should have seperate inventories. (It does..) But their armour slots stay the same. I.e. if they're in world X they have a full inventory plus armour. When they go into world Y, their inventories clear but their armour slot is still filled. For me, on my server, this means people can get into the Survival world (world Y) with armour they spawned in Freebuild. (world X). I hope this gets fixed and I thought I'd let you know.