Door Reopens when a Serialised Item is Inventoried (qty has to be greater than 1)

Problem: When inventorying a serialised item, the vending machine will find the item as usual & open the door. Once the user has carried out the inventory and closes the door, the system will "load" then the vend door will reopen and no messages/actions are prompted on screen. When the user closes the door again, the inventory is "completed", and the system heads back to the inventory menu as usual.

Issue here is the door opens twice, allowing the user to remove/add items at the second door opening unmonitored.