Description of the Bug:

If an existing item, say item A, present in storage box A. When the storage box is full, you can no longer put in anymore item A into the box even if they can be merged. The selection for the box will simply be greyed out and disabled.

Steps to reproduce:

1. Put any items into a storage box until it is full

2. Try to put in any more of the same item that presents in the box is not possible since the selection is disable.

What should have happened?

Items in inventory that are also presented in the box should be allowed to put into the box if they can be merged.

What did happen?

No more items can be put into the box whether the items can be merged or not

My System:

Windows 10 Home, Chrome 86.0.4240.198