If a player closes an inventory right before a new one opens on a server, the server thinks the client has no open inventory, meaning items that should not be taken can be, and act as ghost items after closing the inventory

Steps to reproduce:
Make a server with a plugin that means clicking on an item in the inventory opens a new inventory with unstealable items
Click on the item, then quickly close the inventory before the new one opens

What I expect to happen:
The unstealable items should not be taken, and the server should register the click

What happens:
You are able to take the items from the new inventory
After closing the inventory, the items become ghost items

Extra info:
This might seem like a bug with plugins, but its not, it is caused by the server not noticing the new inventory has opened, which is a minecraft bug