Inventory doesn't work the first time but works every time after

[SilentSuprion]

So I’m making an inventory. But for some reason it doesn’t work the first, but works every time after.
1st Item:

2nd item:

Scipt that changes the description value and name value:

ImageClone.Name = "Name"
Values.Descsription.Value = "Description"
Values.ItemName.Value = "Name"
wait(0.1)|
ImageClone.Parent = Slot

Thanks for reading.