For years, we have ran a plugin that “bounced” loot out of partially emptied containers after 60 seconds. This is done so that the container could respawn with fresh loot. Bounced loot would remain on the ground for a short time for any other player passing by to pick up. However, this method has been causing problems with items getting saved even though they were already destroyed in the world (item leaking).
So the plugin has been updated to now simply destroy the partially emptied container after 60 seconds rather than bouncing the loot out. This should solve the item leak issue while still allowing containers to respawn after being partially looted.