Oven Item Bug (Or an loading bug)

Put the summary of the bug you're having here

What I expected to happen was...:
If you but an item to melt in an oven (example an iron ore) and hold the shift key

and spamming the mouse buttons, you would get that item as usual.

What actually happened was...:
If you do it now, it won't show you that you collected the iron ore (or different),

it will still display an iron ore at the melting slot (an ghost item).

Steps to Reproduce:
1. Just hold shift and spam your mouse buttons.